From: Sarah Hoffmann <lonvia@denofr.de>
Date: Mon, 21 Dec 2020 10:33:38 +0000 (+0100)
Subject: Merge pull request #2115 from lonvia/use-dotenv
X-Git-Tag: v3.7.0~66
X-Git-Url: https://git.openstreetmap.org./nominatim.git/commitdiff_plain/301fd7f7e8d97755849e26427c12eed070f21b5f?hp=aeeee0d5dab4586d1346db91a76427cc81a95945

Merge pull request #2115 from lonvia/use-dotenv

Switch configuration to dotenv
---

diff --git a/.github/actions/build-nominatim/action.yml b/.github/actions/build-nominatim/action.yml
index 9bb66df3..555d7ee2 100644
--- a/.github/actions/build-nominatim/action.yml
+++ b/.github/actions/build-nominatim/action.yml
@@ -5,7 +5,8 @@ runs:
 
     steps:
         - name: Install prerequisits
-          run: sudo apt-get install -y -qq libboost-system-dev libboost-filesystem-dev libexpat1-dev zlib1g-dev libbz2-dev libpq-dev libproj-dev python3-psycopg2 python3-pyosmium
+          run: |
+            sudo apt-get install -y -qq libboost-system-dev libboost-filesystem-dev libexpat1-dev zlib1g-dev libbz2-dev libpq-dev libproj-dev python3-psycopg2 python3-pyosmium php-symfony-dotenv
           shell: bash
 
         - name: Configure
diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index 1f64df27..cbb7aa6c 100644
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -35,8 +35,8 @@ jobs:
             - uses: actions/cache@v2
               with:
                   path: |
-                      data/country_osm_grid.sql.gz
-                      monaco-latest.osm.pbf
+                     {{ github.workspace }}/data/country_osm_grid.sql.gz
+                     {{ github.workspace }}/monaco-latest.osm.pbf
                   key: nominatim-data-${{ steps.get-date.outputs.date }}
 
             - uses: ./.github/actions/setup-postgresql
@@ -78,8 +78,8 @@ jobs:
             - uses: actions/cache@v2
               with:
                   path: |
-                      data/country_osm_grid.sql.gz
-                      monaco-latest.osm.pbf
+                     {{ github.workspace }}/data/country_osm_grid.sql.gz
+                     {{ github.workspace }}/monaco-latest.osm.pbf
                   key: nominatim-data-${{ steps.get-date.outputs.date }}
 
             - uses: ./.github/actions/setup-postgresql
@@ -90,8 +90,7 @@ jobs:
 
             - name: Create configuration
               run: |
-                   echo '<?php' > settings/local.php
-                   echo " @define('CONST_Pyosmium_Binary', '/usr/lib/python3-pyosmium/pyosmium-get-changes');" >> settings/local.php
+                   echo "NOMINATIM_PYOSMIUM_BINARY=/usr/lib/python3-pyosmium/pyosmium-get-changes" >> .env
               working-directory: build
 
             - name: Download import data
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 59d9e3a6..b4f4ddb8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -96,51 +96,28 @@ endif()
 
 if (BUILD_IMPORTER)
    set(CUSTOMSCRIPTS
-       utils/check_import_finished.php
-       utils/country_languages.php
-       utils/importWikipedia.php
-       utils/export.php
-       utils/query.php
-       utils/setup.php
-       utils/specialphrases.php
-       utils/update.php
-       utils/warm.php
+       check_import_finished.php
+       country_languages.php
+       importWikipedia.php
+       export.php
+       query.php
+       setup.php
+       specialphrases.php
+       update.php
+       warm.php
       )
 
    foreach (script_source ${CUSTOMSCRIPTS})
        configure_file(${PROJECT_SOURCE_DIR}/cmake/script.tmpl
-                      ${PROJECT_BINARY_DIR}/${script_source})
+                      ${PROJECT_BINARY_DIR}/utils/${script_source})
    endforeach()
 endif()
 
 #-----------------------------------------------------------------------------
-# webserver scripts (API only)
+# Targets for running a development webserver from the build directory.
 #-----------------------------------------------------------------------------
 
 if (BUILD_API)
-   set(WEBSITESCRIPTS
-       website/deletable.php
-       website/details.php
-       website/lookup.php
-       website/polygons.php
-       website/reverse.php
-       website/search.php
-       website/status.php
-   )
-
-   foreach (script_source ${WEBSITESCRIPTS})
-       configure_file(${PROJECT_SOURCE_DIR}/cmake/website.tmpl
-                      ${PROJECT_BINARY_DIR}/${script_source})
-   endforeach()
-
-   set(WEBPATHS css images js)
-
-   foreach (wp ${WEBPATHS})
-       execute_process(
-           COMMAND ln -sf ${PROJECT_SOURCE_DIR}/website/${wp} ${PROJECT_BINARY_DIR}/website/
-       )
-   endforeach()
-
    add_custom_target(serve
            php -S 127.0.0.1:8088
            WORKING_DIRECTORY ${PROJECT_BINARY_DIR}/website
@@ -152,13 +129,6 @@ if (BUILD_API)
    )
 endif()
 
-#-----------------------------------------------------------------------------
-# default settings
-#-----------------------------------------------------------------------------
-
-configure_file(${PROJECT_SOURCE_DIR}/settings/defaults.php
-               ${PROJECT_BINARY_DIR}/settings/settings.php)
-
 #-----------------------------------------------------------------------------
 # Tests
 #-----------------------------------------------------------------------------
diff --git a/cmake/script.tmpl b/cmake/script.tmpl
index 8146ca8b..4d9224b0 100755
--- a/cmake/script.tmpl
+++ b/cmake/script.tmpl
@@ -1,4 +1,7 @@
 #!@PHP_BIN@ -Cq
 <?php
-require_once(dirname(dirname(__FILE__)).'/settings/settings.php');
-require_once(CONST_BasePath.'/@script_source@');
+@define('CONST_BinDir', '@CMAKE_SOURCE_DIR@/utils');
+@define('CONST_LibDir', '@CMAKE_SOURCE_DIR@/lib');
+@define('CONST_DataDir', '@CMAKE_SOURCE_DIR@');
+
+require_once(CONST_BinDir.'/@script_source@');
diff --git a/cmake/website.tmpl b/cmake/website.tmpl
deleted file mode 100755
index 268ded39..00000000
--- a/cmake/website.tmpl
+++ /dev/null
@@ -1,5 +0,0 @@
-<?php
-@define('CONST_Debug', (isset($_GET['debug']) && $_GET['debug']));
-require_once(dirname(dirname(__FILE__)).'/settings/settings-frontend.php');
-
-require_once(CONST_BasePath.'/@script_source@');
diff --git a/docs/admin/Advanced-Installations.md b/docs/admin/Advanced-Installations.md
index 5b0275b3..5701992c 100644
--- a/docs/admin/Advanced-Installations.md
+++ b/docs/admin/Advanced-Installations.md
@@ -162,11 +162,11 @@ PostgreSQL server process.
 
 On the client side you now need to configure the import to point to the
 correct location of the library **on the database server**. Add the following
-line to your your `settings/local.php` file:
+line to your your `.env` file:
 
 ```php
-@define('CONST_Database_Module_Path', '<directory on the database server where nominatim.so resides>');
+NOMINATIM_DATABASE_MODULE_PATH="<directory on the database server where nominatim.so resides>"
 ```
 
-Now change the `CONST_Database_DSN` to point to your remote server and continue
+Now change the `NOMINATIM_DATABASE_DSN` to point to your remote server and continue
 to follow the [standard instructions for importing](/admin/Import).
diff --git a/docs/admin/Faq.md b/docs/admin/Faq.md
index bca6b49d..6203959d 100644
--- a/docs/admin/Faq.md
+++ b/docs/admin/Faq.md
@@ -211,11 +211,3 @@ for more information.
 ### Can I import negative OSM ids into Nominatim?
 
 See [this question of Stackoverflow](https://help.openstreetmap.org/questions/64662/nominatim-flatnode-with-negative-id).
-
-### Missing XML or text declaration
-
-The website might show: `XML Parsing Error: XML or text declaration not at start of entity Location.`
-
-Make sure there are no spaces at the beginning of your `settings/local.php` file.
-
-
diff --git a/docs/admin/Import.md b/docs/admin/Import.md
index 792070e4..41942d6f 100644
--- a/docs/admin/Import.md
+++ b/docs/admin/Import.md
@@ -5,18 +5,17 @@ from an OSM planet file and how to keep the database up to date. It
 is assumed that you have already successfully installed the Nominatim
 software itself, if not return to the [installation page](Installation.md).
 
-## Configuration setup in settings/local.php
+## Configuration setup in `.env`
 
-The Nominatim server can be customized via the file `settings/local.php`
-in the build directory. Note that this is a PHP file, so it must always
-start like this:
-
-    <?php
-
-without any leading spaces.
+The Nominatim server can be customized via a `.env` in the build directory.
+This is a file in [dotenv](https://symfony.com/doc/4.3/components/dotenv.html) format
+which looks the same as variable settings in a standard shell environment.
+You can also set the same configuration via environment variables. All
+settings have a `NOMINATIM_` prefix to avoid conflicts with other environment
+variables.
 
 There are lots of configuration settings you can tweak. Have a look
-at `settings/default.php` for a full list. Most should have a sensible default.
+at `settings/env.default` for a full list. Most should have a sensible default.
 
 #### Flatnode files
 
@@ -24,9 +23,9 @@ If you plan to import a large dataset (e.g. Europe, North America, planet),
 you should also enable flatnode storage of node locations. With this
 setting enabled, node coordinates are stored in a simple file instead
 of the database. This will save you import time and disk storage.
-Add to your `settings/local.php`:
+Add to your `.env`:
 
-    @define('CONST_Osm2pgsql_Flatnode_File', '/path/to/flatnode.file');
+    NOMINATIM_FLATNODE_FILE="/path/to/flatnode.file"
 
 Replace the second part with a suitable path on your system and make sure
 the directory exists. There should be at least 75GB of free space.
@@ -124,7 +123,7 @@ import styles available which only read selected data:
   Like the full style but also adds most of the OSM tags into the extratags
   column.
 
-The style can be changed with the configuration `CONST_Import_Style`.
+The style can be changed with the configuration `NOMINATIM_IMPORT_STYLE`.
 
 To give you an idea of the impact of using the different styles, the table
 below gives rough estimates of the final database size after import of a
@@ -269,9 +268,9 @@ entire US adds about 10GB to your database.
 
         ./utils/setup.php --import-tiger-data
 
-  3. Enable use of the Tiger data in your `settings/local.php` by adding:
+  3. Enable use of the Tiger data in your `.env` by adding:
 
-         @define('CONST_Use_US_Tiger_Data', true);
+         NOMINATIM_USE_US_TIGER_DATA=yes
 
   4. Apply the new settings:
 
diff --git a/docs/admin/Update.md b/docs/admin/Update.md
index 4ddfc9de..98f5244a 100644
--- a/docs/admin/Update.md
+++ b/docs/admin/Update.md
@@ -19,9 +19,9 @@ pip3 install --user osmium
 
 Nominatim needs a tool called `pyosmium-get-changes` which comes with
 Pyosmium. You need to tell Nominatim where to find it. Add the
-following line to your `settings/local.php`:
+following line to your `.env`:
 
-    @define('CONST_Pyosmium_Binary', '/home/user/.local/bin/pyosmium-get-changes');
+    NOMINATIM_PYOSMIUM_BINARY=/home/user/.local/bin/pyosmium-get-changes
 
 The path above is fine if you used the `--user` parameter with pip.
 Replace `user` with your user name.
@@ -32,15 +32,15 @@ Next the update needs to be initialised. By default Nominatim is configured
 to update using the global minutely diffs.
 
 If you want a different update source you will need to add some settings
-to `settings/local.php`. For example, to use the daily country extracts
+to `.env`. For example, to use the daily country extracts
 diffs for Ireland from Geofabrik add the following:
 
-    // base URL of the replication service
-    @define('CONST_Replication_Url', 'https://download.geofabrik.de/europe/ireland-and-northern-ireland-updates');
-    // How often upstream publishes diffs
-    @define('CONST_Replication_Update_Interval', '86400');
-    // How long to sleep if no update found yet
-    @define('CONST_Replication_Recheck_Interval', '900');
+    # base URL of the replication service
+    NOMINATIM_REPLICATION_URL="https://download.geofabrik.de/europe/ireland-and-northern-ireland-updates"
+    # How often upstream publishes diffs
+    NOMINATIM_REPLICATION_UPDATE_INTERVAL=86400
+    # How long to sleep if no update found yet
+    NOMINATIM_REPLICATION_RECHECK_INTERVAL=900
 
 To set up the update process now run the following command:
 
diff --git a/docs/develop/Development-Environment.md b/docs/develop/Development-Environment.md
index 2f6f54ce..f0c36ba3 100644
--- a/docs/develop/Development-Environment.md
+++ b/docs/develop/Development-Environment.md
@@ -102,13 +102,20 @@ cmake $USERNAME/Nominatim
 make
 ```
 
-Copy the test settings:
+Create a minimal test settings file:
 
 ```
-cp $USERNAME/Nominatim/test/testdb/local.php settings/
+tee .env << EOF
+NOMINATIM_DATABASE_DSN="pgsql:dbname=test_api_nominatim"
+NOMINATIM_USE_US_TIGER_DATA=yes
+NOMINATIM_TIGER_DATA_PATH=tiger
+NOMINATIM_WIKIPEDIA_DATA_PATH=$USERNAME/Nominatim/test/testdb
+EOF
 ```
 
 Inspect the file to check that all settings are correct for your local setup.
+In particular, the wikipedia path should point to the test directory in your
+Nominatim source directory.
 
 Now you can import the test database:
 
diff --git a/docs/develop/Import.md b/docs/develop/Import.md
index b3e268f3..c9612bb3 100644
--- a/docs/develop/Import.md
+++ b/docs/develop/Import.md
@@ -29,7 +29,7 @@ once with `class` of `highway` and once with a `class` of `bridge`. Thus the
 ## Configuring the Import
 
 How tags are interpreted and assigned to the different `place` columns can be
-configured via the import style configuration file (`CONST_Import_style`). This
+configured via the import style configuration file (`NOMINATIM_IMPORT_STYLE`). This
 is a JSON file which contains a list of rules which are matched against every
 tag of every object and then assign the tag its specific role.
 
diff --git a/docs/develop/Ranking.md b/docs/develop/Ranking.md
index 3caeb50e..5b1ca191 100644
--- a/docs/develop/Ranking.md
+++ b/docs/develop/Ranking.md
@@ -87,9 +87,9 @@ into the database. There are a few hard-coded rules for the assignment:
     * highway nodes
     * landuse that is not an area
 
-Other than that, the ranks can be freely assigned via the JSON file
-defined with `CONST_Address_Level_Config` according to their type and
-the country they are in.
+Other than that, the ranks can be freely assigned via the JSON file according
+to their type and the country they are in. The name of the config file to be
+used can be changed with the setting `NOMINATIM_ADDRESS_LEVEL_CONFIG`.
 
 The address level configuration must consist of an array of configuration
 entries, each containing a tag definition and an optional country array:
diff --git a/lib/AddressDetails.php b/lib/AddressDetails.php
index a27d3e79..3d17ede5 100644
--- a/lib/AddressDetails.php
+++ b/lib/AddressDetails.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/ClassTypes.php');
+require_once(CONST_LibDir.'/ClassTypes.php');
 
 /**
  * Detailed list of address parts for a single result
diff --git a/lib/DB.php b/lib/DB.php
index 38b3e27e..0454a0ff 100644
--- a/lib/DB.php
+++ b/lib/DB.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/DatabaseError.php');
+require_once(CONST_LibDir.'/DatabaseError.php');
 
 /**
  * Uses PDO to access the database specified in the CONST_Database_DSN
@@ -12,9 +12,9 @@ class DB
 {
     protected $connection;
 
-    public function __construct($sDSN = CONST_Database_DSN)
+    public function __construct($sDSN = null)
     {
-        $this->sDSN = $sDSN;
+        $this->sDSN = $sDSN ?? getSetting('DATABASE_DSN');
     }
 
     public function connect($bNew = false, $bPersistent = true)
diff --git a/lib/Geocode.php b/lib/Geocode.php
index ed02848e..12f9da37 100644
--- a/lib/Geocode.php
+++ b/lib/Geocode.php
@@ -2,12 +2,12 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/PlaceLookup.php');
-require_once(CONST_BasePath.'/lib/Phrase.php');
-require_once(CONST_BasePath.'/lib/ReverseGeocode.php');
-require_once(CONST_BasePath.'/lib/SearchDescription.php');
-require_once(CONST_BasePath.'/lib/SearchContext.php');
-require_once(CONST_BasePath.'/lib/TokenList.php');
+require_once(CONST_LibDir.'/PlaceLookup.php');
+require_once(CONST_LibDir.'/Phrase.php');
+require_once(CONST_LibDir.'/ReverseGeocode.php');
+require_once(CONST_LibDir.'/SearchDescription.php');
+require_once(CONST_LibDir.'/SearchContext.php');
+require_once(CONST_LibDir.'/TokenList.php');
 
 class Geocode
 {
@@ -18,7 +18,7 @@ class Geocode
     protected $aLangPrefOrder = array();
 
     protected $aExcludePlaceIDs = array();
-    protected $bReverseInPlan = false;
+    protected $bReverseInPlan = true;
 
     protected $iLimit = 20;
     protected $iFinalLimit = 10;
diff --git a/lib/PlaceLookup.php b/lib/PlaceLookup.php
index a2f39ea3..6d7b6be1 100644
--- a/lib/PlaceLookup.php
+++ b/lib/PlaceLookup.php
@@ -2,8 +2,8 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/AddressDetails.php');
-require_once(CONST_BasePath.'/lib/Result.php');
+require_once(CONST_LibDir.'/AddressDetails.php');
+require_once(CONST_LibDir.'/Result.php');
 
 class PlaceLookup
 {
@@ -486,65 +486,63 @@ class PlaceLookup
         $aOutlineResult = array();
         if (!$iPlaceID) return $aOutlineResult;
 
-        if (CONST_Search_AreaPolygons) {
-            // Get the bounding box and outline polygon
-            $sSQL = 'select place_id,0 as numfeatures,st_area(geometry) as area,';
-            if ($fLonReverse != null && $fLatReverse != null) {
-                $sSQL .= ' ST_Y(closest_point) as centrelat,';
-                $sSQL .= ' ST_X(closest_point) as centrelon,';
-            } else {
-                $sSQL .= ' ST_Y(centroid) as centrelat, ST_X(centroid) as centrelon,';
-            }
-            $sSQL .= ' ST_YMin(geometry) as minlat,ST_YMax(geometry) as maxlat,';
-            $sSQL .= ' ST_XMin(geometry) as minlon,ST_XMax(geometry) as maxlon';
-            if ($this->bIncludePolygonAsGeoJSON) $sSQL .= ',ST_AsGeoJSON(geometry) as asgeojson';
-            if ($this->bIncludePolygonAsKML) $sSQL .= ',ST_AsKML(geometry) as askml';
-            if ($this->bIncludePolygonAsSVG) $sSQL .= ',ST_AsSVG(geometry) as assvg';
-            if ($this->bIncludePolygonAsText) $sSQL .= ',ST_AsText(geometry) as astext';
-            if ($fLonReverse != null && $fLatReverse != null) {
-                $sFrom = ' from (SELECT * , CASE WHEN (class = \'highway\') AND (ST_GeometryType(geometry) = \'ST_LineString\') THEN ';
-                $sFrom .=' ST_ClosestPoint(geometry, ST_SetSRID(ST_Point('.$fLatReverse.','.$fLonReverse.'),4326))';
-                $sFrom .=' ELSE centroid END AS closest_point';
-                $sFrom .= ' from placex where place_id = '.$iPlaceID.') as plx';
-            } else {
-                $sFrom = ' from placex where place_id = '.$iPlaceID;
-            }
-            if ($this->fPolygonSimplificationThreshold > 0) {
-                $sSQL .= ' from (select place_id,centroid,ST_SimplifyPreserveTopology(geometry,'.$this->fPolygonSimplificationThreshold.') as geometry'.$sFrom.') as plx';
-            } else {
-                $sSQL .= $sFrom;
-            }
-
-            $aPointPolygon = $this->oDB->getRow($sSQL, null, 'Could not get outline');
+        // Get the bounding box and outline polygon
+        $sSQL = 'select place_id,0 as numfeatures,st_area(geometry) as area,';
+        if ($fLonReverse != null && $fLatReverse != null) {
+            $sSQL .= ' ST_Y(closest_point) as centrelat,';
+            $sSQL .= ' ST_X(closest_point) as centrelon,';
+        } else {
+            $sSQL .= ' ST_Y(centroid) as centrelat, ST_X(centroid) as centrelon,';
+        }
+        $sSQL .= ' ST_YMin(geometry) as minlat,ST_YMax(geometry) as maxlat,';
+        $sSQL .= ' ST_XMin(geometry) as minlon,ST_XMax(geometry) as maxlon';
+        if ($this->bIncludePolygonAsGeoJSON) $sSQL .= ',ST_AsGeoJSON(geometry) as asgeojson';
+        if ($this->bIncludePolygonAsKML) $sSQL .= ',ST_AsKML(geometry) as askml';
+        if ($this->bIncludePolygonAsSVG) $sSQL .= ',ST_AsSVG(geometry) as assvg';
+        if ($this->bIncludePolygonAsText) $sSQL .= ',ST_AsText(geometry) as astext';
+        if ($fLonReverse != null && $fLatReverse != null) {
+            $sFrom = ' from (SELECT * , CASE WHEN (class = \'highway\') AND (ST_GeometryType(geometry) = \'ST_LineString\') THEN ';
+            $sFrom .=' ST_ClosestPoint(geometry, ST_SetSRID(ST_Point('.$fLatReverse.','.$fLonReverse.'),4326))';
+            $sFrom .=' ELSE centroid END AS closest_point';
+            $sFrom .= ' from placex where place_id = '.$iPlaceID.') as plx';
+        } else {
+            $sFrom = ' from placex where place_id = '.$iPlaceID;
+        }
+        if ($this->fPolygonSimplificationThreshold > 0) {
+            $sSQL .= ' from (select place_id,centroid,ST_SimplifyPreserveTopology(geometry,'.$this->fPolygonSimplificationThreshold.') as geometry'.$sFrom.') as plx';
+        } else {
+            $sSQL .= $sFrom;
+        }
 
-            if ($aPointPolygon && $aPointPolygon['place_id']) {
-                if ($aPointPolygon['centrelon'] !== null && $aPointPolygon['centrelat'] !== null) {
-                    $aOutlineResult['lat'] = $aPointPolygon['centrelat'];
-                    $aOutlineResult['lon'] = $aPointPolygon['centrelon'];
-                }
+        $aPointPolygon = $this->oDB->getRow($sSQL, null, 'Could not get outline');
 
-                if ($this->bIncludePolygonAsGeoJSON) $aOutlineResult['asgeojson'] = $aPointPolygon['asgeojson'];
-                if ($this->bIncludePolygonAsKML) $aOutlineResult['askml'] = $aPointPolygon['askml'];
-                if ($this->bIncludePolygonAsSVG) $aOutlineResult['assvg'] = $aPointPolygon['assvg'];
-                if ($this->bIncludePolygonAsText) $aOutlineResult['astext'] = $aPointPolygon['astext'];
+        if ($aPointPolygon && $aPointPolygon['place_id']) {
+            if ($aPointPolygon['centrelon'] !== null && $aPointPolygon['centrelat'] !== null) {
+                $aOutlineResult['lat'] = $aPointPolygon['centrelat'];
+                $aOutlineResult['lon'] = $aPointPolygon['centrelon'];
+            }
 
-                if (abs($aPointPolygon['minlat'] - $aPointPolygon['maxlat']) < 0.0000001) {
-                    $aPointPolygon['minlat'] = $aPointPolygon['minlat'] - $fRadius;
-                    $aPointPolygon['maxlat'] = $aPointPolygon['maxlat'] + $fRadius;
-                }
+            if ($this->bIncludePolygonAsGeoJSON) $aOutlineResult['asgeojson'] = $aPointPolygon['asgeojson'];
+            if ($this->bIncludePolygonAsKML) $aOutlineResult['askml'] = $aPointPolygon['askml'];
+            if ($this->bIncludePolygonAsSVG) $aOutlineResult['assvg'] = $aPointPolygon['assvg'];
+            if ($this->bIncludePolygonAsText) $aOutlineResult['astext'] = $aPointPolygon['astext'];
 
-                if (abs($aPointPolygon['minlon'] - $aPointPolygon['maxlon']) < 0.0000001) {
-                    $aPointPolygon['minlon'] = $aPointPolygon['minlon'] - $fRadius;
-                    $aPointPolygon['maxlon'] = $aPointPolygon['maxlon'] + $fRadius;
-                }
+            if (abs($aPointPolygon['minlat'] - $aPointPolygon['maxlat']) < 0.0000001) {
+                $aPointPolygon['minlat'] = $aPointPolygon['minlat'] - $fRadius;
+                $aPointPolygon['maxlat'] = $aPointPolygon['maxlat'] + $fRadius;
+            }
 
-                $aOutlineResult['aBoundingBox'] = array(
-                                                   (string)$aPointPolygon['minlat'],
-                                                   (string)$aPointPolygon['maxlat'],
-                                                   (string)$aPointPolygon['minlon'],
-                                                   (string)$aPointPolygon['maxlon']
-                                                  );
+            if (abs($aPointPolygon['minlon'] - $aPointPolygon['maxlon']) < 0.0000001) {
+                $aPointPolygon['minlon'] = $aPointPolygon['minlon'] - $fRadius;
+                $aPointPolygon['maxlon'] = $aPointPolygon['maxlon'] + $fRadius;
             }
+
+            $aOutlineResult['aBoundingBox'] = array(
+                                               (string)$aPointPolygon['minlat'],
+                                               (string)$aPointPolygon['maxlat'],
+                                               (string)$aPointPolygon['minlon'],
+                                               (string)$aPointPolygon['maxlon']
+                                              );
         }
 
         // as a fallback we generate a bounding box without knowing the size of the geometry
diff --git a/lib/ReverseGeocode.php b/lib/ReverseGeocode.php
index 032f442e..b420e5dd 100644
--- a/lib/ReverseGeocode.php
+++ b/lib/ReverseGeocode.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/Result.php');
+require_once(CONST_LibDir.'/Result.php');
 
 class ReverseGeocode
 {
diff --git a/lib/SearchContext.php b/lib/SearchContext.php
index c2898d27..8316a012 100644
--- a/lib/SearchContext.php
+++ b/lib/SearchContext.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/lib.php');
+require_once(CONST_LibDir.'/lib.php');
 
 
 /**
diff --git a/lib/SearchDescription.php b/lib/SearchDescription.php
index 15c6bf23..f0106063 100644
--- a/lib/SearchDescription.php
+++ b/lib/SearchDescription.php
@@ -2,9 +2,9 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/SpecialSearchOperator.php');
-require_once(CONST_BasePath.'/lib/SearchContext.php');
-require_once(CONST_BasePath.'/lib/Result.php');
+require_once(CONST_LibDir.'/SpecialSearchOperator.php');
+require_once(CONST_LibDir.'/SearchContext.php');
+require_once(CONST_LibDir.'/Result.php');
 
 /**
  * Description of a single interpretation of a search query.
diff --git a/lib/TokenList.php b/lib/TokenList.php
index 1b6a1dcf..a419da6a 100644
--- a/lib/TokenList.php
+++ b/lib/TokenList.php
@@ -2,12 +2,12 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/TokenCountry.php');
-require_once(CONST_BasePath.'/lib/TokenHousenumber.php');
-require_once(CONST_BasePath.'/lib/TokenPostcode.php');
-require_once(CONST_BasePath.'/lib/TokenSpecialTerm.php');
-require_once(CONST_BasePath.'/lib/TokenWord.php');
-require_once(CONST_BasePath.'/lib/SpecialSearchOperator.php');
+require_once(CONST_LibDir.'/TokenCountry.php');
+require_once(CONST_LibDir.'/TokenHousenumber.php');
+require_once(CONST_LibDir.'/TokenPostcode.php');
+require_once(CONST_LibDir.'/TokenSpecialTerm.php');
+require_once(CONST_LibDir.'/TokenWord.php');
+require_once(CONST_LibDir.'/SpecialSearchOperator.php');
 
 /**
  * Saves information about the tokens that appear in a search query.
diff --git a/lib/TokenSpecialTerm.php b/lib/TokenSpecialTerm.php
index 64e4b3d4..b2c312ec 100644
--- a/lib/TokenSpecialTerm.php
+++ b/lib/TokenSpecialTerm.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim\Token;
 
-require_once(CONST_BasePath.'/lib/SpecialSearchOperator.php');
+require_once(CONST_LibDir.'/SpecialSearchOperator.php');
 
 /**
  * A word token describing a place type.
diff --git a/lib/cmd.php b/lib/cmd.php
index 72b66608..5a12f99a 100644
--- a/lib/cmd.php
+++ b/lib/cmd.php
@@ -1,6 +1,6 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/Shell.php');
+require_once(CONST_LibDir.'/Shell.php');
 
 function getCmdOpt($aArg, $aSpec, &$aResult, $bExitOnError = false, $bExitOnUnknown = false)
 {
@@ -147,7 +147,7 @@ function repeatWarnings()
 function runSQLScript($sScript, $bfatal = true, $bVerbose = false, $bIgnoreErrors = false)
 {
     // Convert database DSN to psql parameters
-    $aDSNInfo = \Nominatim\DB::parseDSN(CONST_Database_DSN);
+    $aDSNInfo = \Nominatim\DB::parseDSN(getSetting('DATABASE_DSN'));
     if (!isset($aDSNInfo['port']) || !$aDSNInfo['port']) $aDSNInfo['port'] = 5432;
 
     $oCmd = new \Nominatim\Shell('psql');
@@ -195,3 +195,30 @@ function runSQLScript($sScript, $bfatal = true, $bVerbose = false, $bIgnoreError
         fail("pgsql returned with error code ($iReturn)");
     }
 }
+
+function setupHTTPProxy()
+{
+    if (!getSettingBool('HTTP_PROXY')) {
+        return;
+    }
+
+    $sProxy = 'tcp://'.getSetting('HTTP_PROXY_HOST').':'.getSetting('HTTP_PROXY_PROT');
+    $aHeaders = array();
+
+    $sLogin = getSetting('HTTP_PROXY_LOGIN');
+    $sPassword = getSetting('HTTP_PROXY_PASSWORD');
+
+    if ($sLogin && $sPassword) {
+        $sAuth = base64_encode($sLogin.':'.$sPassword);
+        $aHeaders = array('Proxy-Authorization: Basic '.$sAuth);
+    }
+
+    $aProxyHeader = array(
+                     'proxy' => $sProxy,
+                     'request_fulluri' => true,
+                     'header' => $aHeaders
+                    );
+
+    $aContext = array('http' => $aProxyHeader, 'https' => $aProxyHeader);
+    stream_context_set_default($aContext);
+}
diff --git a/lib/init-cmd.php b/lib/init-cmd.php
index 50c709c9..b7645cd5 100644
--- a/lib/init-cmd.php
+++ b/lib/init-cmd.php
@@ -3,26 +3,3 @@
 require_once('init.php');
 require_once('cmd.php');
 require_once('DebugNone.php');
-
-// handle http proxy when using file_get_contents
-if (CONST_HTTP_Proxy) {
-    $proxy = 'tcp://' . CONST_HTTP_Proxy_Host . ':' . CONST_HTTP_Proxy_Port;
-    $aHeaders = array();
-    if (CONST_HTTP_Proxy_Login != null && CONST_HTTP_Proxy_Login != '' && CONST_HTTP_Proxy_Password != null && CONST_HTTP_Proxy_Password != '') {
-        $auth = base64_encode(CONST_HTTP_Proxy_Login . ':' . CONST_HTTP_Proxy_Password);
-        $aHeaders = array("Proxy-Authorization: Basic $auth");
-    }
-    $aContext = array(
-                 'http' => array(
-                            'proxy' => $proxy,
-                            'request_fulluri' => true,
-                            'header' => $aHeaders
-                           ),
-                 'https' => array(
-                             'proxy' => $proxy,
-                             'request_fulluri' => true,
-                             'header' => $aHeaders
-                            )
-                );
-    stream_context_set_default($aContext);
-}
diff --git a/lib/init-website.php b/lib/init-website.php
index 302a9478..f2d52980 100644
--- a/lib/init-website.php
+++ b/lib/init-website.php
@@ -20,7 +20,7 @@ function exception_handler_json($exception)
 {
     http_response_code($exception->getCode());
     header('Content-type: application/json; charset=utf-8');
-    include(CONST_BasePath.'/lib/template/error-json.php');
+    include(CONST_LibDir.'/template/error-json.php');
     exit();
 }
 
@@ -29,7 +29,7 @@ function exception_handler_xml($exception)
     http_response_code($exception->getCode());
     header('Content-type: text/xml; charset=utf-8');
     echo '<?xml version="1.0" encoding="UTF-8" ?>'."\n";
-    include(CONST_BasePath.'/lib/template/error-xml.php');
+    include(CONST_LibDir.'/template/error-xml.php');
     exit();
 }
 
diff --git a/lib/init.php b/lib/init.php
index 082d1bf5..cc50aaf3 100644
--- a/lib/init.php
+++ b/lib/init.php
@@ -1,4 +1,4 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/lib.php');
-require_once(CONST_BasePath.'/lib/DB.php');
+require_once(CONST_LibDir.'/lib.php');
+require_once(CONST_LibDir.'/DB.php');
diff --git a/lib/lib.php b/lib/lib.php
index fcd22066..b4c415d9 100644
--- a/lib/lib.php
+++ b/lib/lib.php
@@ -1,5 +1,50 @@
 <?php
 
+require('Symfony/Component/Dotenv/autoload.php');
+
+function loadSettings($sProjectDir)
+{
+    @define('CONST_InstallDir', $sProjectDir);
+
+    $dotenv = new \Symfony\Component\Dotenv\Dotenv();
+    $dotenv->load(CONST_DataDir.'/settings/env.defaults');
+
+    if (file_exists($sProjectDir.'/.env')) {
+        $dotenv->load($sProjectDir.'/.env');
+    }
+}
+
+function getSetting($sConfName, $sDefault = null)
+{
+    $sValue = $_SERVER['NOMINATIM_'.$sConfName];
+
+    if ($sDefault !== null && !$sValue) {
+        return $sDefault;
+    }
+
+    return $sValue;
+}
+
+function getSettingBool($sConfName)
+{
+    $sVal = strtolower(getSetting($sConfName));
+
+    return strcmp($sVal, 'yes') == 0
+           || strcmp($sVal, 'true') == 0
+           || strcmp($sVal, '1') == 0;
+}
+
+function getSettingConfig($sConfName, $sSystemConfig)
+{
+    $sValue = $_ENV['NOMINATIM_'.$sConfName];
+
+    if (!$sValue) {
+        return CONST_DataDir.'/settings/'.$sSystemConfig;
+    }
+
+    return $sValue;
+}
+
 function fail($sError, $sUserError = false)
 {
     if (!$sUserError) $sUserError = $sError;
@@ -89,6 +134,24 @@ function addQuotes($s)
     return "'".$s."'";
 }
 
+function fwriteConstDef($rFile, $sConstName, $value)
+{
+    $sEscapedValue;
+
+    if (is_bool($value)) {
+        $sEscapedValue = $value ? 'true' : 'false';
+    } elseif (is_numeric($value)) {
+        $sEscapedValue = strval($value);
+    } elseif (!$value) {
+        $sEscapedValue = 'false';
+    } else {
+        $sEscapedValue = addQuotes(str_replace("'", "\\'", (string)$value));
+    }
+
+    fwrite($rFile, "@define('CONST_$sConstName', $sEscapedValue);\n");
+}
+
+
 function parseLatLon($sQuery)
 {
     $sFound    = null;
diff --git a/lib/setup/SetupClass.php b/lib/setup/SetupClass.php
index f16c9e60..d3c4c4eb 100755
--- a/lib/setup/SetupClass.php
+++ b/lib/setup/SetupClass.php
@@ -2,8 +2,8 @@
 
 namespace Nominatim\Setup;
 
-require_once(CONST_BasePath.'/lib/setup/AddressLevelParser.php');
-require_once(CONST_BasePath.'/lib/Shell.php');
+require_once(CONST_LibDir.'/setup/AddressLevelParser.php');
+require_once(CONST_LibDir.'/Shell.php');
 
 class SetupFunctions
 {
@@ -34,7 +34,7 @@ class SetupFunctions
 
         if (isset($aCMDResult['osm2pgsql-cache'])) {
             $this->iCacheMemory = $aCMDResult['osm2pgsql-cache'];
-        } elseif (!is_null(CONST_Osm2pgsql_Flatnode_File)) {
+        } elseif (getSetting('FLATNODE_FILE')) {
             // When flatnode files are enabled then disable cache per default.
             $this->iCacheMemory = 0;
         } else {
@@ -42,11 +42,11 @@ class SetupFunctions
             $this->iCacheMemory = getCacheMemoryMB();
         }
 
-        $this->sModulePath = CONST_Database_Module_Path;
+        $this->sModulePath = getSetting('DATABASE_MODULE_PATH', CONST_InstallDir.'/module');
         info('module path: ' . $this->sModulePath);
 
         // parse database string
-        $this->aDSNInfo = \Nominatim\DB::parseDSN(CONST_Database_DSN);
+        $this->aDSNInfo = \Nominatim\DB::parseDSN(getSetting('DATABASE_DSN'));
         if (!isset($this->aDSNInfo['port'])) {
             $this->aDSNInfo['port'] = 5432;
         }
@@ -86,7 +86,7 @@ class SetupFunctions
         $oDB = new \Nominatim\DB;
 
         if ($oDB->checkConnection()) {
-            fail('database already exists ('.CONST_Database_DSN.')');
+            fail('database already exists ('.getSetting('DATABASE_DSN').')');
         }
 
         $oCmd = (new \Nominatim\Shell('createdb'))
@@ -130,34 +130,35 @@ class SetupFunctions
             exit(1);
         }
 
-        $i = $this->db()->getOne("select count(*) from pg_user where usename = '".CONST_Database_Web_User."'");
+        $sPgUser = getSetting('DATABASE_WEBUSER');
+        $i = $this->db()->getOne("select count(*) from pg_user where usename = '$sPgUser'");
         if ($i == 0) {
-            echo "\nERROR: Web user '".CONST_Database_Web_User."' does not exist. Create it with:\n";
-            echo "\n          createuser ".CONST_Database_Web_User."\n\n";
+            echo "\nERROR: Web user '".$sPgUser."' does not exist. Create it with:\n";
+            echo "\n          createuser ".$sPgUser."\n\n";
             exit(1);
         }
 
         // Try accessing the C module, so we know early if something is wrong
-        checkModulePresence(); // raises exception on failure
+        $this->checkModulePresence(); // raises exception on failure
 
-        if (!file_exists(CONST_ExtraDataPath.'/country_osm_grid.sql.gz')) {
+        if (!file_exists(CONST_DataDir.'/data/country_osm_grid.sql.gz')) {
             echo 'Error: you need to download the country_osm_grid first:';
-            echo "\n    wget -O ".CONST_ExtraDataPath."/country_osm_grid.sql.gz https://www.nominatim.org/data/country_grid.sql.gz\n";
+            echo "\n    wget -O ".CONST_DataDir."/data/country_osm_grid.sql.gz https://www.nominatim.org/data/country_grid.sql.gz\n";
             exit(1);
         }
-        $this->pgsqlRunScriptFile(CONST_BasePath.'/data/country_name.sql');
-        $this->pgsqlRunScriptFile(CONST_ExtraDataPath.'/country_osm_grid.sql.gz');
-        $this->pgsqlRunScriptFile(CONST_BasePath.'/data/gb_postcode_table.sql');
-        $this->pgsqlRunScriptFile(CONST_BasePath.'/data/us_postcode_table.sql');
+        $this->pgsqlRunScriptFile(CONST_DataDir.'/data/country_name.sql');
+        $this->pgsqlRunScriptFile(CONST_DataDir.'/data/country_osm_grid.sql.gz');
+        $this->pgsqlRunScriptFile(CONST_DataDir.'/data/gb_postcode_table.sql');
+        $this->pgsqlRunScriptFile(CONST_DataDir.'/data/us_postcode_table.sql');
 
-        $sPostcodeFilename = CONST_BasePath.'/data/gb_postcode_data.sql.gz';
+        $sPostcodeFilename = CONST_DataDir.'/data/gb_postcode_data.sql.gz';
         if (file_exists($sPostcodeFilename)) {
             $this->pgsqlRunScriptFile($sPostcodeFilename);
         } else {
             warn('optional external GB postcode table file ('.$sPostcodeFilename.') not found. Skipping.');
         }
 
-        $sPostcodeFilename = CONST_BasePath.'/data/us_postcode_data.sql.gz';
+        $sPostcodeFilename = CONST_DataDir.'/data/us_postcode_data.sql.gz';
         if (file_exists($sPostcodeFilename)) {
             $this->pgsqlRunScriptFile($sPostcodeFilename);
         } else {
@@ -173,29 +174,29 @@ class SetupFunctions
     {
         info('Import data');
 
-        if (!file_exists(CONST_Osm2pgsql_Binary)) {
-            echo "Check CONST_Osm2pgsql_Binary in your local settings file.\n";
+        if (!file_exists(getOsm2pgsqlBinary())) {
+            echo "Check NOMINATIM_OSM2PGSQL_BINARY in your local .env file.\n";
             echo "Normally you should not need to set this manually.\n";
-            fail("osm2pgsql not found in '".CONST_Osm2pgsql_Binary."'");
+            fail("osm2pgsql not found in '".getOsm2pgsqlBinary()."'");
         }
 
-        $oCmd = new \Nominatim\Shell(CONST_Osm2pgsql_Binary);
-        $oCmd->addParams('--style', CONST_Import_Style);
+        $oCmd = new \Nominatim\Shell(getOsm2pgsqlBinary());
+        $oCmd->addParams('--style', getImportStyle());
 
-        if (!is_null(CONST_Osm2pgsql_Flatnode_File) && CONST_Osm2pgsql_Flatnode_File) {
-            $oCmd->addParams('--flat-nodes', CONST_Osm2pgsql_Flatnode_File);
+        if (getSetting('FLATNODE_FILE')) {
+            $oCmd->addParams('--flat-nodes', getSetting('FLATNODE_FILE'));
         }
-        if (CONST_Tablespace_Osm2pgsql_Data) {
-            $oCmd->addParams('--tablespace-slim-data', CONST_Tablespace_Osm2pgsql_Data);
+        if (getSetting('TABLESPACE_OSM_DATA')) {
+            $oCmd->addParams('--tablespace-slim-data', getSetting('TABLESPACE_OSM_DATA'));
         }
-        if (CONST_Tablespace_Osm2pgsql_Index) {
-            $oCmd->addParams('--tablespace-slim-index', CONST_Tablespace_Osm2pgsql_Index);
+        if (getSetting('TABLESPACE_OSM_INDEX')) {
+            $oCmd->addParams('--tablespace-slim-index', getSetting('TABLESPACE_OSM_INDEX'));
         }
-        if (CONST_Tablespace_Place_Data) {
-            $oCmd->addParams('--tablespace-main-data', CONST_Tablespace_Place_Data);
+        if (getSetting('TABLESPACE_PLACE_DATA')) {
+            $oCmd->addParams('--tablespace-main-data', getSetting('TABLESPACE_PLACE_DATA'));
         }
-        if (CONST_Tablespace_Place_Index) {
-            $oCmd->addParams('--tablespace-main-index', CONST_Tablespace_Place_Index);
+        if (getSetting('TABLESPACE_PLACE_INDEX')) {
+            $oCmd->addParams('--tablespace-main-index', getSetting('TABLESPACE_PLACE_INDEX'));
         }
         $oCmd->addParams('--latlong', '--slim', '--create');
         $oCmd->addParams('--output', 'gazetteer');
@@ -234,7 +235,7 @@ class SetupFunctions
         info('Create Functions');
 
         // Try accessing the C module, so we know early if something is wrong
-        checkModulePresence(); // raises exception on failure
+        $this->checkModulePresence(); // raises exception on failure
 
         $this->createSqlFunctions();
     }
@@ -243,7 +244,7 @@ class SetupFunctions
     {
         info('Create Tables');
 
-        $sTemplate = file_get_contents(CONST_BasePath.'/sql/tables.sql');
+        $sTemplate = file_get_contents(CONST_DataDir.'/sql/tables.sql');
         $sTemplate = $this->replaceSqlPatterns($sTemplate);
 
         $this->pgsqlRunScript($sTemplate, false);
@@ -252,7 +253,7 @@ class SetupFunctions
             $this->dropTable('search_name');
         }
 
-        $oAlParser = new AddressLevelParser(CONST_Address_Level_Config);
+        $oAlParser = new AddressLevelParser(getSettingConfig('ADDRESS_LEVEL_CONFIG', 'address-levels.json'));
         $oAlParser->createTable($this->db(), 'address_levels');
     }
 
@@ -260,7 +261,7 @@ class SetupFunctions
     {
         info('Create Tables');
 
-        $sTemplate = file_get_contents(CONST_BasePath.'/sql/table-triggers.sql');
+        $sTemplate = file_get_contents(CONST_DataDir.'/sql/table-triggers.sql');
         $sTemplate = $this->replaceSqlPatterns($sTemplate);
 
         $this->pgsqlRunScript($sTemplate, false);
@@ -270,7 +271,7 @@ class SetupFunctions
     {
         info('Create Partition Tables');
 
-        $sTemplate = file_get_contents(CONST_BasePath.'/sql/partition-tables.src.sql');
+        $sTemplate = file_get_contents(CONST_DataDir.'/sql/partition-tables.src.sql');
         $sTemplate = $this->replaceSqlPatterns($sTemplate);
 
         $this->pgsqlRunPartitionScript($sTemplate);
@@ -280,13 +281,14 @@ class SetupFunctions
     {
         info('Create Partition Functions');
 
-        $sTemplate = file_get_contents(CONST_BasePath.'/sql/partition-functions.src.sql');
+        $sTemplate = file_get_contents(CONST_DataDir.'/sql/partition-functions.src.sql');
         $this->pgsqlRunPartitionScript($sTemplate);
     }
 
     public function importWikipediaArticles()
     {
-        $sWikiArticlesFile = CONST_Wikipedia_Data_Path.'/wikimedia-importance.sql.gz';
+        $sWikiArticlePath = getSetting('WIKIPEDIA_DATA_PATH', CONST_DataDir.'/data');
+        $sWikiArticlesFile = $sWikiArticlePath.'/wikimedia-importance.sql.gz';
         if (file_exists($sWikiArticlesFile)) {
             info('Importing wikipedia articles and redirects');
             $this->dropTable('wikipedia_article');
@@ -335,14 +337,14 @@ class SetupFunctions
 
         // used by getorcreate_word_id to ignore frequent partial words
         $sSQL = 'CREATE OR REPLACE FUNCTION get_maxwordfreq() RETURNS integer AS ';
-        $sSQL .= '$$ SELECT '.CONST_Max_Word_Frequency.' as maxwordfreq; $$ LANGUAGE SQL IMMUTABLE';
+        $sSQL .= '$$ SELECT '.getSetting('MAX_WORD_FREQUENCY').' as maxwordfreq; $$ LANGUAGE SQL IMMUTABLE';
         $oDB->exec($sSQL);
         echo ".\n";
 
         // pre-create the word list
         if (!$bDisableTokenPrecalc) {
             info('Loading word list');
-            $this->pgsqlRunScriptFile(CONST_BasePath.'/data/words.sql');
+            $this->pgsqlRunScriptFile(CONST_DataDir.'/data/words.sql');
         }
 
         info('Load Data');
@@ -352,7 +354,7 @@ class SetupFunctions
         $iLoadThreads = max(1, $this->iInstances - 1);
         for ($i = 0; $i < $iLoadThreads; $i++) {
             // https://secure.php.net/manual/en/function.pg-connect.php
-            $DSN = CONST_Database_DSN;
+            $DSN = getSetting('DATABASE_DSN');
             $DSN = preg_replace('/^pgsql:/', '', $DSN);
             $DSN = preg_replace('/;/', ' ', $DSN);
             $aDBInstances[$i] = pg_connect($DSN, PGSQL_CONNECT_FORCE_NEW);
@@ -372,7 +374,7 @@ class SetupFunctions
 
         // last thread for interpolation lines
         // https://secure.php.net/manual/en/function.pg-connect.php
-        $DSN = CONST_Database_DSN;
+        $DSN = getSetting('DATABASE_DSN');
         $DSN = preg_replace('/^pgsql:/', '', $DSN);
         $DSN = preg_replace('/;/', ' ', $DSN);
         $aDBInstances[$iLoadThreads] = pg_connect($DSN, PGSQL_CONNECT_FORCE_NEW);
@@ -424,17 +426,17 @@ class SetupFunctions
         }
     }
 
-    public function importTigerData()
+    public function importTigerData($sTigerPath)
     {
         info('Import Tiger data');
 
-        $aFilenames = glob(CONST_Tiger_Data_Path.'/*.sql');
-        info('Found '.count($aFilenames).' SQL files in path '.CONST_Tiger_Data_Path);
+        $aFilenames = glob($sTigerPath.'/*.sql');
+        info('Found '.count($aFilenames).' SQL files in path '.$sTigerPath);
         if (empty($aFilenames)) {
-            warn('Tiger data import selected but no files found in path '.CONST_Tiger_Data_Path);
+            warn('Tiger data import selected but no files found in path '.$sTigerPath);
             return;
         }
-        $sTemplate = file_get_contents(CONST_BasePath.'/sql/tiger_import_start.sql');
+        $sTemplate = file_get_contents(CONST_DataDir.'/sql/tiger_import_start.sql');
         $sTemplate = $this->replaceSqlPatterns($sTemplate);
 
         $this->pgsqlRunScript($sTemplate, false);
@@ -442,7 +444,7 @@ class SetupFunctions
         $aDBInstances = array();
         for ($i = 0; $i < $this->iInstances; $i++) {
             // https://secure.php.net/manual/en/function.pg-connect.php
-            $DSN = CONST_Database_DSN;
+            $DSN = getSetting('DATABASE_DSN');
             $DSN = preg_replace('/^pgsql:/', '', $DSN);
             $DSN = preg_replace('/;/', ' ', $DSN);
             $aDBInstances[$i] = pg_connect($DSN, PGSQL_CONNECT_FORCE_NEW | PGSQL_CONNECT_ASYNC);
@@ -488,7 +490,7 @@ class SetupFunctions
         }
 
         info('Creating indexes on Tiger data');
-        $sTemplate = file_get_contents(CONST_BasePath.'/sql/tiger_import_finish.sql');
+        $sTemplate = file_get_contents(CONST_DataDir.'/sql/tiger_import_finish.sql');
         $sTemplate = $this->replaceSqlPatterns($sTemplate);
 
         $this->pgsqlRunScript($sTemplate, false);
@@ -542,9 +544,9 @@ class SetupFunctions
 
     public function index($bIndexNoanalyse)
     {
-        checkModulePresence(); // raises exception on failure
+        $this->checkModulePresence(); // raises exception on failure
 
-        $oBaseCmd = (new \Nominatim\Shell(CONST_BasePath.'/nominatim/nominatim.py'))
+        $oBaseCmd = (new \Nominatim\Shell(CONST_DataDir.'/nominatim/nominatim.py'))
                     ->addParams('--database', $this->aDSNInfo['database'])
                     ->addParams('--port', $this->aDSNInfo['port'])
                     ->addParams('--threads', $this->iInstances);
@@ -616,12 +618,12 @@ class SetupFunctions
             $this->db()->exec("DROP INDEX $sIndexName;");
         }
 
-        $sTemplate = file_get_contents(CONST_BasePath.'/sql/indices.src.sql');
+        $sTemplate = file_get_contents(CONST_DataDir.'/sql/indices.src.sql');
         if (!$this->bDrop) {
-            $sTemplate .= file_get_contents(CONST_BasePath.'/sql/indices_updates.src.sql');
+            $sTemplate .= file_get_contents(CONST_DataDir.'/sql/indices_updates.src.sql');
         }
         if (!$this->dbReverseOnly()) {
-            $sTemplate .= file_get_contents(CONST_BasePath.'/sql/indices_search.src.sql');
+            $sTemplate .= file_get_contents(CONST_DataDir.'/sql/indices_search.src.sql');
         }
         $sTemplate = $this->replaceSqlPatterns($sTemplate);
 
@@ -638,10 +640,11 @@ class SetupFunctions
         $this->pgsqlRunScript("select count(*) from (select getorcreate_country(make_standard_name(name->'name'), country_code) from country_name where name ? 'name') as x");
         $sSQL = 'select count(*) from (select getorcreate_country(make_standard_name(v),'
             .'country_code) from (select country_code, skeys(name) as k, svals(name) as v from country_name) x where k ';
-        if (CONST_Languages) {
+        $sLanguages = getSetting('LANGUAGES');
+        if ($sLanguages) {
             $sSQL .= 'in ';
             $sDelim = '(';
-            foreach (explode(',', CONST_Languages) as $sLang) {
+            foreach (explode(',', $sLanguages) as $sLang) {
                 $sSQL .= $sDelim."'name:$sLang'";
                 $sDelim = ',';
             }
@@ -703,36 +706,60 @@ class SetupFunctions
     }
 
     /**
-     * Setup settings-frontend.php in the build/website directory
+     * Setup the directory for the API scripts.
      *
      * @return null
      */
     public function setupWebsite()
     {
-        $rOutputFile = fopen(CONST_InstallPath.'/settings/settings-frontend.php', 'w');
-
-        fwrite($rOutputFile, "<?php
-@define('CONST_BasePath', '".CONST_BasePath."');
-if (file_exists(getenv('NOMINATIM_SETTINGS'))) require_once(getenv('NOMINATIM_SETTINGS'));
-
-@define('CONST_Database_DSN', '".CONST_Database_DSN."');
-@define('CONST_Default_Language', ".(CONST_Default_Language ? ("'".CONST_Default_Language."'") : 'false').");
-@define('CONST_Log_DB', ".(CONST_Log_DB ? 'true' : 'false').");
-@define('CONST_Log_File', ".(CONST_Log_File ? ("'".CONST_Log_File."'")  : 'false').");
-@define('CONST_Max_Word_Frequency', '".CONST_Max_Word_Frequency."');
-@define('CONST_NoAccessControl', ".CONST_NoAccessControl.");
-@define('CONST_Places_Max_ID_count', ".CONST_Places_Max_ID_count.");
-@define('CONST_PolygonOutput_MaximumTypes', ".CONST_PolygonOutput_MaximumTypes.");
-@define('CONST_Search_AreaPolygons', ".CONST_Search_AreaPolygons.");
-@define('CONST_Search_BatchMode', ".(CONST_Search_BatchMode ? 'true' : 'false').");
-@define('CONST_Search_NameOnlySearchFrequencyThreshold', ".CONST_Search_NameOnlySearchFrequencyThreshold.");
-@define('CONST_Search_ReversePlanForAll', ".CONST_Search_ReversePlanForAll.");
-@define('CONST_Term_Normalization_Rules', \"".CONST_Term_Normalization_Rules."\");
-@define('CONST_Use_Aux_Location_data', ".(CONST_Use_Aux_Location_data ? 'true' : 'false').");
-@define('CONST_Use_US_Tiger_Data', ".(CONST_Use_US_Tiger_Data ? 'true' : 'false').");
-@define('CONST_MapIcon_URL', ".(CONST_MapIcon_URL ? ("'".CONST_MapIcon_URL."'") : 'false').');
-');
-        info(CONST_InstallPath.'/settings/settings-frontend.php has been set up successfully');
+        if (!is_dir(CONST_InstallDir.'/website')) {
+            info('Creating directory for website scripts at: '.CONST_InstallDir.'/website');
+            mkdir(CONST_InstallDir.'/website');
+        }
+
+        $aScripts = array(
+          'deletable.php',
+          'details.php',
+          'lookup.php',
+          'polygons.php',
+          'reverse.php',
+          'search.php',
+          'status.php'
+        );
+
+        foreach ($aScripts as $sScript) {
+            $rFile = fopen(CONST_InstallDir.'/website/'.$sScript, 'w');
+
+            fwrite($rFile, "<?php\n\n");
+            fwrite($rFile, '@define(\'CONST_Debug\', $_GET[\'debug\'] ?? false);'."\n\n");
+
+            fwriteConstDef($rFile, 'LibDir', CONST_LibDir);
+            fwriteConstDef($rFile, 'DataDir', CONST_DataDir);
+            fwriteConstDef($rFile, 'InstallDir', CONST_InstallDir);
+
+            fwrite($rFile, "if (file_exists(getenv('NOMINATIM_SETTINGS'))) require_once(getenv('NOMINATIM_SETTINGS'));\n\n");
+
+            fwriteConstDef($rFile, 'Database_DSN', getSetting('DATABASE_DSN'));
+            fwriteConstDef($rFile, 'Default_Language', getSetting('DEFAULT_LANGUAGE'));
+            fwriteConstDef($rFile, 'Log_DB', getSettingBool('LOG_DB'));
+            fwriteConstDef($rFile, 'Log_File', getSetting('LOG_FILE'));
+            fwriteConstDef($rFile, 'Max_Word_Frequency', (int)getSetting('MAX_WORD_FREQUENCY'));
+            fwriteConstDef($rFile, 'NoAccessControl', getSettingBool('CORS_NOACCESSCONTROL'));
+            fwriteConstDef($rFile, 'Places_Max_ID_count', (int)getSetting('LOOKUP_MAX_COUNT'));
+            fwriteConstDef($rFile, 'PolygonOutput_MaximumTypes', getSetting('POLYGON_OUTPUT_MAX_TYPES'));
+            fwriteConstDef($rFile, 'Search_BatchMode', getSettingBool('SEARCH_BATCH_MODE'));
+            fwriteConstDef($rFile, 'Search_NameOnlySearchFrequencyThreshold', getSetting('SEARCH_NAME_ONLY_THRESHOLD'));
+            fwriteConstDef($rFile, 'Term_Normalization_Rules', getSetting('TERM_NORMALIZATION'));
+            fwriteConstDef($rFile, 'Use_Aux_Location_data', getSettingBool('USE_AUX_LOCATION_DATA'));
+            fwriteConstDef($rFile, 'Use_US_Tiger_Data', getSettingBool('USE_US_TIGER_DATA'));
+            fwriteConstDef($rFile, 'MapIcon_URL', getSetting('MAPICON_URL'));
+
+            // XXX scripts should go into the library.
+            fwrite($rFile, 'require_once(\''.CONST_DataDir.'/website/'.$sScript."');\n");
+            fclose($rFile);
+
+            chmod(CONST_InstallDir.'/website/'.$sScript, 0755);
+        }
     }
 
     /**
@@ -755,11 +782,10 @@ if (file_exists(getenv('NOMINATIM_SETTINGS'))) require_once(getenv('NOMINATIM_SE
 
     private function removeFlatnodeFile()
     {
-        if (!is_null(CONST_Osm2pgsql_Flatnode_File) && CONST_Osm2pgsql_Flatnode_File) {
-            if (file_exists(CONST_Osm2pgsql_Flatnode_File)) {
-                if ($this->bVerbose) echo 'Deleting '.CONST_Osm2pgsql_Flatnode_File."\n";
-                unlink(CONST_Osm2pgsql_Flatnode_File);
-            }
+        $sFName = getSetting('FLATNODE_FILE');
+        if ($sFName && file_exists($sFName)) {
+            if ($this->bVerbose) echo 'Deleting '.$sFName."\n";
+            unlink($sFName);
         }
     }
 
@@ -775,7 +801,7 @@ if (file_exists(getenv('NOMINATIM_SETTINGS'))) require_once(getenv('NOMINATIM_SE
 
     private function createSqlFunctions()
     {
-        $sBasePath = CONST_BasePath.'/sql/functions/';
+        $sBasePath = CONST_DataDir.'/sql/functions/';
         $sTemplate = file_get_contents($sBasePath.'utils.sql');
         $sTemplate .= file_get_contents($sBasePath.'normalization.sql');
         $sTemplate .= file_get_contents($sBasePath.'ranking.sql');
@@ -798,13 +824,13 @@ if (file_exists(getenv('NOMINATIM_SETTINGS'))) require_once(getenv('NOMINATIM_SE
         if ($this->bEnableDebugStatements) {
             $sTemplate = str_replace('--DEBUG:', '', $sTemplate);
         }
-        if (CONST_Limit_Reindexing) {
+        if (getSettingBool('LIMIT_REINDEXING')) {
             $sTemplate = str_replace('--LIMIT INDEXING:', '', $sTemplate);
         }
-        if (!CONST_Use_US_Tiger_Data) {
+        if (!getSettingBool('USE_US_TIGER_DATA')) {
             $sTemplate = str_replace('-- %NOTIGERDATA% ', '', $sTemplate);
         }
-        if (!CONST_Use_Aux_Location_data) {
+        if (!getSettingBool('USE_AUX_LOCATION_DATA')) {
             $sTemplate = str_replace('-- %NOAUXDATA% ', '', $sTemplate);
         }
 
@@ -895,15 +921,15 @@ if (file_exists(getenv('NOMINATIM_SETTINGS'))) require_once(getenv('NOMINATIM_SE
 
     private function replaceSqlPatterns($sSql)
     {
-        $sSql = str_replace('{www-user}', CONST_Database_Web_User, $sSql);
+        $sSql = str_replace('{www-user}', getSetting('DATABASE_WEBUSER'), $sSql);
 
         $aPatterns = array(
-                      '{ts:address-data}' => CONST_Tablespace_Address_Data,
-                      '{ts:address-index}' => CONST_Tablespace_Address_Index,
-                      '{ts:search-data}' => CONST_Tablespace_Search_Data,
-                      '{ts:search-index}' =>  CONST_Tablespace_Search_Index,
-                      '{ts:aux-data}' =>  CONST_Tablespace_Aux_Data,
-                      '{ts:aux-index}' =>  CONST_Tablespace_Aux_Index,
+                      '{ts:address-data}' => getSetting('TABLESPACE_ADDRESS_DATA'),
+                      '{ts:address-index}' => getSetting('TABLESPACE_ADDRESS_INDEX'),
+                      '{ts:search-data}' => getSetting('TABLESPACE_SEARCH_DATA'),
+                      '{ts:search-index}' =>  getSetting('TABLESPACE_SEARCH_INDEX'),
+                      '{ts:aux-data}' =>  getSetting('TABLESPACE_AUX_DATA'),
+                      '{ts:aux-index}' =>  getSetting('TABLESPACE_AUX_INDEX')
         );
 
         foreach ($aPatterns as $sPattern => $sTablespace) {
@@ -939,4 +965,20 @@ if (file_exists(getenv('NOMINATIM_SETTINGS'))) require_once(getenv('NOMINATIM_SE
     {
         return !($this->db()->tableExists('search_name'));
     }
+
+    /**
+     * Try accessing the C module, so we know early if something is wrong.
+     *
+     * Raises Nominatim\DatabaseError on failure
+     */
+    private function checkModulePresence()
+    {
+        $sSQL = "CREATE FUNCTION nominatim_test_import_func(text) RETURNS text AS '";
+        $sSQL .= $this->sModulePath . "/nominatim.so', 'transliteration' LANGUAGE c IMMUTABLE STRICT";
+        $sSQL .= ';DROP FUNCTION nominatim_test_import_func(text);';
+
+        $oDB = new \Nominatim\DB();
+        $oDB->connect();
+        $oDB->exec($sSQL, null, 'Database server failed to load '.$this->sModulePath.'/nominatim.so module');
+    }
 }
diff --git a/lib/setup_functions.php b/lib/setup_functions.php
index 43f30a09..a2287d9b 100755
--- a/lib/setup_functions.php
+++ b/lib/setup_functions.php
@@ -15,17 +15,23 @@ function checkInFile($sOSMFile)
     }
 }
 
-function checkModulePresence()
+function getOsm2pgsqlBinary()
 {
-    // Try accessing the C module, so we know early if something is wrong.
-    // Raises Nominatim\DatabaseError on failure
+    $sBinary = getSetting('OSM2PGSQL_BINARY');
+    if (!$sBinary) {
+        $sBinary = CONST_InstallDir.'/osm2pgsql/osm2pgsql';
+    }
+
+    return $sBinary;
+}
 
-    $sModulePath = CONST_Database_Module_Path;
-    $sSQL = "CREATE FUNCTION nominatim_test_import_func(text) RETURNS text AS '";
-    $sSQL .= $sModulePath . "/nominatim.so', 'transliteration' LANGUAGE c IMMUTABLE STRICT";
-    $sSQL .= ';DROP FUNCTION nominatim_test_import_func(text);';
+function getImportStyle()
+{
+    $sStyle = getSetting('IMPORT_STYLE');
+
+    if (in_array($sStyle, array('admin', 'street', 'address', 'full', 'extratags'))) {
+        return CONST_DataDir.'/settings/import-'.$sStyle.'.style';
+    }
 
-    $oDB = new \Nominatim\DB();
-    $oDB->connect();
-    $oDB->exec($sSQL, null, 'Database server failed to load '.$sModulePath.'/nominatim.so module');
+    return $sStyle;
 }
diff --git a/settings/defaults.php b/settings/defaults.php
deleted file mode 100644
index 2ecbb514..00000000
--- a/settings/defaults.php
+++ /dev/null
@@ -1,118 +0,0 @@
-<?php
-@define('CONST_BasePath', '@CMAKE_SOURCE_DIR@');
-@define('CONST_InstallPath', '@CMAKE_BINARY_DIR@');
-if (file_exists(getenv('NOMINATIM_SETTINGS'))) require_once(getenv('NOMINATIM_SETTINGS'));
-if (file_exists(CONST_InstallPath.'/settings/local.php')) require_once(CONST_InstallPath.'/settings/local.php');
-
-// General settings
-@define('CONST_Database_DSN', 'pgsql:dbname=nominatim'); // or add ;host=...;port=...;user=...;password=...
-@define('CONST_Database_Web_User', 'www-data');
-@define('CONST_Database_Module_Path', CONST_InstallPath.'/module');
-@define('CONST_Max_Word_Frequency', '50000');
-@define('CONST_Limit_Reindexing', true);
-// Restrict search languages.
-// Normally Nominatim will include all language variants of name:XX
-// in the search index. Set this to a comma separated list of language
-// codes, to restrict import to a subset of languages.
-// Currently only affects the import of country names and special phrases.
-@define('CONST_Languages', false);
-// Rules for normalizing terms for comparison before doing comparisons.
-// The default is to remove accents and punctuation and to lower-case the
-// term. Spaces are kept but collapsed to one standard space.
-@define('CONST_Term_Normalization_Rules', ":: NFD (); [[:Nonspacing Mark:] [:Cf:]] >;  :: lower (); [[:Punctuation:][:Space:]]+ > ' '; :: NFC ();");
-
-/* Set to true after importing Tiger house number data for the US.
-   Note: The tables must already exist or queries will throw errors.
-         After changing this setting run ./utils/setup --create-functions
-         again. */
-@define('CONST_Use_US_Tiger_Data', false);
-/* Set to true after importing other external house number data.
-   Note: the aux tables must already exist or queries will throw errors.
-        After changing this setting run ./utils/setup --create-functions
-        again. */
-@define('CONST_Use_Aux_Location_data', false);
-
-// Proxy settings
-@define('CONST_HTTP_Proxy', false);
-@define('CONST_HTTP_Proxy_Host', 'proxy.mydomain.com');
-@define('CONST_HTTP_Proxy_Port', '3128');
-@define('CONST_HTTP_Proxy_Login', '');
-@define('CONST_HTTP_Proxy_Password', '');
-
-// Paths
-@define('CONST_ExtraDataPath', CONST_BasePath.'/data');
-@define('CONST_Osm2pgsql_Binary', CONST_InstallPath.'/osm2pgsql/osm2pgsql');
-@define('CONST_Pyosmium_Binary', '@PYOSMIUM_PATH@');
-@define('CONST_Tiger_Data_Path', CONST_ExtraDataPath.'/tiger');
-@define('CONST_Wikipedia_Data_Path', CONST_ExtraDataPath);
-@define('CONST_Phrase_Config', CONST_BasePath.'/settings/phrase_settings.php');
-@define('CONST_Address_Level_Config', CONST_BasePath.'/settings/address-levels.json');
-@define('CONST_Import_Style', CONST_BasePath.'/settings/import-full.style');
-
-// osm2pgsql settings
-@define('CONST_Osm2pgsql_Flatnode_File', null);
-
-// tablespace settings
-// osm2pgsql caching tables (aka slim mode tables) - update only
-@define('CONST_Tablespace_Osm2pgsql_Data', false);
-@define('CONST_Tablespace_Osm2pgsql_Index', false);
-// osm2pgsql output tables (aka main table) - update only
-@define('CONST_Tablespace_Place_Data', false);
-@define('CONST_Tablespace_Place_Index', false);
-// address computation tables - update only
-@define('CONST_Tablespace_Address_Data', false);
-@define('CONST_Tablespace_Address_Index', false);
-// search tables - needed for lookups
-@define('CONST_Tablespace_Search_Data', false);
-@define('CONST_Tablespace_Search_Index', false);
-// additional data, e.g. TIGER data, type searches - needed for lookups
-@define('CONST_Tablespace_Aux_Data', false);
-@define('CONST_Tablespace_Aux_Index', false);
-
-//// Replication settings
-
-// Base URL of replication service
-@define('CONST_Replication_Url', 'https://planet.openstreetmap.org/replication/minute');
-
-// Maximum size in MB of data to download per batch
-@define('CONST_Replication_Max_Diff_size', '30');
-// How long until the service publishes the next diff
-// (relative to the age of data in the diff).
-@define('CONST_Replication_Update_Interval', '75');
-// How long to sleep when no update could be found
-@define('CONST_Replication_Recheck_Interval', '60');
-
-// If true, send CORS headers to allow access
-@define('CONST_NoAccessControl', true);
-
-// Set this to the /mapicon directory of your nominatim-ui to enable returning
-// icon URLs with the results.
-@define('CONST_MapIcon_URL', false);
-// Language to assume when none is supplied with the query.
-// When set to false, the local language (i.e. the name tag without suffix)
-// will be used.
-@define('CONST_Default_Language', false);
-
-@define('CONST_Search_AreaPolygons', true);
-
-@define('CONST_Search_BatchMode', false);
-
-@define('CONST_Search_NameOnlySearchFrequencyThreshold', 500);
-// If set to true, then reverse order of queries will be tried by default.
-// When set to false only selected languages allow reverse search.
-@define('CONST_Search_ReversePlanForAll', true);
-
-// Maximum number of OSM ids that may be queried at once
-// for the places endpoint.
-@define('CONST_Places_Max_ID_count', 50);
-
-// Number of different geometry formats that may be queried in parallel.
-// Set to zero to disable polygon output.
-@define('CONST_PolygonOutput_MaximumTypes', 1);
-
-// Log settings
-// Set to true to log into new_query_log table.
-// You should set up a cron job that regularly clears out this table.
-@define('CONST_Log_DB', false);
-// Set to a file name to enable logging to a file.
-@define('CONST_Log_File', false);
diff --git a/settings/env.defaults b/settings/env.defaults
new file mode 100644
index 00000000..fbad3e33
--- /dev/null
+++ b/settings/env.defaults
@@ -0,0 +1,213 @@
+# .env
+# Default configuration settings for Nominatim.
+# This file uses the dotenv format.
+
+# Database connection string.
+# Add host, port, user etc through additional semicolon-separated attributes.
+# e.g. ;host=...;port=...;user=...;password=...
+# Changing this variable requires to run 'setup.php --setup-website'.
+NOMINATIM_DATABASE_DSN="pgsql:dbname=nominatim"
+
+# Database web user.
+# Nominatim sets up read-only access for this user during installation.
+NOMINATIM_DATABASE_WEBUSER="www-data"
+
+# Directory where to find the PostgreSQL server module.
+# When empty the module is expected to be located in the 'module' subdirectory
+# in the project directory.
+# Changing this value requires to run ./utils/setup --create-functions.
+NOMINATIM_DATABASE_MODULE_PATH=
+
+# Number of occurances of a word before it is considered frequent.
+# Similar to the concept of stop words. Frequent partial words get ignored
+# or handled differently during search.
+# Changing this value requires a reimport.
+NOMINATIM_MAX_WORD_FREQUENCY=50000
+
+# If true, admin level changes on places with many contained children are blocked.
+NOMINATIM_LIMIT_REINDEXING=yes
+
+# Restrict search languages.
+# Normally Nominatim will include all language variants of name:XX
+# in the search index. Set this to a comma separated list of language
+# codes, to restrict import to a subset of languages.
+# Currently only affects the initial import of country names and special phrases.
+NOMINATIM_LANGUAGES=
+
+# Rules for normalizing terms for comparisons.
+# The default is to remove accents and punctuation and to lower-case the
+# term. Spaces are kept but collapsed to one standard space.
+# Changing this value requires a reimport.
+NOMINATIM_TERM_NORMALIZATION=":: NFD (); [[:Nonspacing Mark:] [:Cf:]] >;  :: lower (); [[:Punctuation:][:Space:]]+ > ' '; :: NFC ();"
+
+# Search in the Tiger house number data for the US.
+# Note: The tables must already exist or queries will throw errors.
+# Changing this value requires to run ./utils/setup --create-functions --setup-website.
+NOMINATIM_USE_US_TIGER_DATA=no
+
+# Search in the auxilary housenumber table.
+# Changing this value requires to run ./utils/setup --create-functions --setup-website.
+NOMINATIM_USE_AUX_LOCATION_DATA=no
+
+# Proxy settings
+# The following settings allow to set a proxy to use when remotely downloading
+# data. Host and port are required. Login and password are optional.
+NOMINATIM_HTTP_PROXY=no
+NOMINATIM_HTTP_PROXY_HOST=proxy.mydomain.com
+NOMINATIM_HTTP_PROXY_PORT=3128
+NOMINATIM_HTTP_PROXY_LOGIN=
+NOMINATIM_HTTP_PROXY_PASSWORD=
+
+# Location of the osm2pgsql binary.
+# When empty, osm2pgsql is expected to reside in the osm2pgsql directory in
+# the project directory.
+# EXPERT ONLY. You should usually use the supplied osm2pgsql.
+NOMINATIM_OSM2PGSQL_BINARY=
+
+# Location of pyosmium-get-changes.
+# Only needed when running updates.
+NOMINATIM_PYOSMIUM_BINARY=
+
+# Directory where to find US Tiger data files to import.
+# Used with setup.php --import-tiger-data. When unset, the data is expected
+# to be located under 'data/tiger' in the source tree.
+NOMINATIM_TIGER_DATA_PATH=
+
+# Directory where to find pre-computed Wikipedia importance files.
+# When unset, the data is expected to be located in the 'data' directory
+# in the source tree.
+NOMINATIM_WIKIPEDIA_DATA_PATH=
+
+# Configuration file for special phrase import.
+# When unset, the internal default settings from 'settings/phrase_settings.php'
+# are used.
+NOMINATIM_PHRASE_CONFIG=
+
+# Configuration file for rank assignments.
+# When unset, the internal default settings from 'settings/address-levels.json'
+# are used.
+NOMINATIM_ADDRESS_LEVEL_CONFIG=
+
+# Configuration file for OSM data import.
+# This may either be the name of one of an internal style or point
+# to a file with a custom style.
+# Internal styles are: admin, street, address, full, extratags
+NOMINATIM_IMPORT_STYLE=extratags
+
+# Location of the flatnode file used by osm2pgsql to store node locations.
+# When unset, osm2pgsql stores the location in the PostgreSQL database. This
+# is especially useful for imports of larger areas, like continents or the
+# full planet. The file needs at least 70GB storage.
+NOMINATIM_FLATNODE_FILE=
+
+### Tablespace settings
+#
+# The following settings allow to move parts of the database tables into
+# different tablespaces. This is especially interesting if you have disks
+# with different speeds. When unset, the default tablespace is used.
+# Only has an effect during import.
+
+# Tablespace used for tables used when searching.
+NOMINATIM_TABLESPACE_SEARCH_DATA=
+# Tablespace used for indexes used when searching.
+NOMINATIM_TABLESPACE_SEARCH_INDEX=
+
+# Tablespace used for the OSM data cache tables. Used for import and update only.
+NOMINATIM_TABLESPACE_OSM_DATA=
+# Tablespace used for the OSM data cache indexes. Used for import and update only.
+NOMINATIM_TABLESPACE_OSM_INDEX=
+
+# Tablespace used for place import table. Used for import and update only.
+NOMINATIM_TABLESPACE_PLACE_DATA=
+# Tablespace used for place import indexes. Used for import and update only.
+NOMINATIM_TABLESPACE_PLACE_INDEX=
+
+# Tablespace for tables used during address computation. Used for import and update only.
+NOMINATIM_TABLESPACE_ADDRESS_DATA=
+# Tablespace for indexes used during address computation. Used for import and update only.
+NOMINATIM_TABLESPACE_ADDRESS_INDEX=
+
+# Tablespace for tables for auxilary data, e.g. TIGER data, postcodes.
+NOMINATIM_TABLESPACE_AUX_DATA=
+# Tablespace for indexes for auxilary data, e.g. TIGER data, postcodes.
+NOMINATIM_TABLESPACE_AUX_INDEX=
+
+
+### Replication settings
+#
+# The following settings control where and how updates for the database are
+# retrieved.
+#
+
+#
+# Base URL of replication service.
+# A replication service provides change files of OSM data at regular intervals.
+# These are used to keep the database up to date. Per default it points to
+# the minutely updates for the main OSM database. There are other services
+# geared towards larger update intervals or data extracts.
+# Changing this value requires to rerun 'update/php --init-updates'.
+NOMINATIM_REPLICATION_URL="https://planet.openstreetmap.org/replication/minute"
+
+# Maximum amount of data to download per batch.
+# Size is in MB.
+NOMINATIM_REPLICATION_MAX_DIFF=50
+
+# Publication interval of the replication service.
+# Determines when Nominatim will attempt again to download again a new
+# update. The time is computed from the publication date of the last diff
+# downloaded. Setting this to a slightly higher value than the actual
+# publication interval avoids unnecessary rechecks.
+NOMINATIM_REPLICATION_UPDATE_INTERVAL=75
+
+# Wait time to recheck for a pending update.
+# Time to wait after an expected update was not available on the server.
+NOMINATIM_REPLICATION_RECHECK_INTERVAL=60
+
+### API settings
+#
+# The following settings configure the API responses. You must rerun
+# setup.php --setup-website after changing any of them.
+
+# Send permissive CORS access headers.
+# When enabled, send CORS headers to allow access to everybody.
+NOMINATIM_CORS_NOACCESSCONTROL=yes
+
+# URL for static icon images.
+# Set this to the /mapicon directory of your nominatim-ui to enable returning
+# icon URLs with the results.
+NOMINATIM_MAPICON_URL=
+
+# Language to assume when no particular language is requested.
+# When unset, the local language (i.e. the name tag without suffix) will be used.
+NOMINATIM_DEFAULT_LANGUAGE=
+
+# Enable a special batch query mode.
+# This features is currently undocumented and potentially broken.
+NOMINATIM_SEARCH_BATCH_MODE=no
+
+# Threshold for searches by name only.
+# Threshold where the lookup strategy in the database is switched. If there
+# are less occurences of a tem than given, the search does the lookup only
+# against the name, otherwise it uses indexes for name and address.
+NOMINATIM_SEARCH_NAME_ONLY_THRESHOLD=500
+
+# Maximum number of OSM ids accepted by /lookup.
+NOMINATIM_LOOKUP_MAX_COUNT=50
+
+# Number of different geometry formats that may be queried in parallel.
+# Set to zero to disable polygon output.
+NOMINATIM_POLYGON_OUTPUT_MAX_TYPES=1
+
+### Log settings
+#
+# The following options allow to enable logging of API requests.
+# You must rerun setup.php --setup-website after changing any of them.
+#
+# Enable logging of requests into the DB.
+# The request will be logged into the new_query_log table.
+# You should set up a cron job that regularly clears out this table.
+NOMINATIM_LOG_DB=no
+
+# Enable logging of requests into a file.
+# To enable logging set this setting to the file to log to.
+NOMINATIM_LOG_FILE=
diff --git a/test/bdd/environment.py b/test/bdd/environment.py
index f0658c33..8847011a 100644
--- a/test/bdd/environment.py
+++ b/test/bdd/environment.py
@@ -48,6 +48,7 @@ class NominatimEnvironment(object):
         self.keep_scenario_db = config['KEEP_TEST_DB']
         self.code_coverage_path = config['PHPCOV']
         self.code_coverage_id = 1
+        self.test_env = None
         os.environ['NOMINATIM_SETTINGS'] = self.local_settings_file
 
         self.template_db_done = False
@@ -72,19 +73,28 @@ class NominatimEnvironment(object):
         return fn
 
     def write_nominatim_config(self, dbname):
-        f = open(self.local_settings_file, 'w')
-        # https://secure.php.net/manual/en/ref.pdo-pgsql.connection.php
-        f.write("<?php\n  @define('CONST_Database_DSN', 'pgsql:dbname=%s%s%s%s%s');\n" %
-                (dbname,
+        dsn = 'pgsql:dbname={}{}{}{}{}'.format(
+                dbname,
                  (';host=' + self.db_host) if self.db_host else '',
                  (';port=' + self.db_port) if self.db_port else '',
                  (';user=' + self.db_user) if self.db_user else '',
                  (';password=' + self.db_pass) if self.db_pass else ''
-                 ))
+                 )
+        self.test_env = os.environ
+        self.test_env['NOMINATIM_DATABASE_DSN'] = dsn
+        self.test_env['NOMINATIM_FLATNODE_FILE'] = ''
+        self.test_env['NOMINATIM_IMPORT_STYLE'] = 'full'
+        self.test_env['NOMINATIM_USE_US_TIGER_DATA'] = 'yes'
+
+        f = open(self.local_settings_file, 'w')
+        # https://secure.php.net/manual/en/ref.pdo-pgsql.connection.php
+        f.write("<?php\n  @define('CONST_Database_DSN', '{}');\n".format(dsn))
         f.write("@define('CONST_Osm2pgsql_Flatnode_File', null);\n")
-        f.write("@define('CONST_Import_Style', CONST_BasePath.'/settings/import-full.style');\n")
+        f.write("@define('CONST_Import_Style', CONST_DataDir.'/settings/import-full.style');\n")
+        f.write("@define('CONST_Use_US_Tiger_Data', true);\n")
         f.close()
 
+
     def cleanup(self):
         try:
             os.remove(self.local_settings_file)
@@ -193,7 +203,7 @@ class NominatimEnvironment(object):
         cmd.extend(['--%s' % x for x in args])
         for k, v in kwargs.items():
             cmd.extend(('--' + k.replace('_', '-'), str(v)))
-        proc = subprocess.Popen(cmd, cwd=self.build_dir,
+        proc = subprocess.Popen(cmd, cwd=self.build_dir, env=self.test_env,
                                 stdout=subprocess.PIPE, stderr=subprocess.PIPE)
         (outp, outerr) = proc.communicate()
         outerr = outerr.decode('utf-8').replace('\\n', '\n')
diff --git a/test/bdd/steps/queries.py b/test/bdd/steps/queries.py
index 65d5dccf..7e88e337 100644
--- a/test/bdd/steps/queries.py
+++ b/test/bdd/steps/queries.py
@@ -282,6 +282,7 @@ def query_cmd(context, query, dups):
     (outp, err) = proc.communicate()
 
     assert_equals (0, proc.returncode, "query.php failed with message: %s\noutput: %s" % (err, outp))
+    logger.debug("run_nominatim_script: %s\n%s\n" % (cmd, outp.decode('utf-8').replace('\\n', '\n')))
 
     context.response = SearchResponse(outp.decode('utf-8'), 'json')
 
diff --git a/test/php/Nominatim/AddressDetailsTest.php b/test/php/Nominatim/AddressDetailsTest.php
index 4678911c..32f4f457 100644
--- a/test/php/Nominatim/AddressDetailsTest.php
+++ b/test/php/Nominatim/AddressDetailsTest.php
@@ -2,8 +2,8 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/init-website.php');
-require_once(CONST_BasePath.'/lib/AddressDetails.php');
+require_once(CONST_LibDir.'/init-website.php');
+require_once(CONST_LibDir.'/AddressDetails.php');
 
 
 class AddressDetailsTest extends \PHPUnit\Framework\TestCase
@@ -30,7 +30,7 @@ class AddressDetailsTest extends \PHPUnit\Framework\TestCase
         //
         // 5) copy&paste into file. Add commas between records
         //
-        $json = file_get_contents(CONST_BasePath.'/test/php/fixtures/address_details_10_downing_street.json');
+        $json = file_get_contents(CONST_DataDir.'/test/php/fixtures/address_details_10_downing_street.json');
         $data = json_decode($json, true);
 
         $this->oDbStub = $this->getMockBuilder(\DB::class)
diff --git a/test/php/Nominatim/ClassTypesTest.php b/test/php/Nominatim/ClassTypesTest.php
index 1ba79bdb..10256954 100644
--- a/test/php/Nominatim/ClassTypesTest.php
+++ b/test/php/Nominatim/ClassTypesTest.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/ClassTypes.php');
+require_once(CONST_LibDir.'/ClassTypes.php');
 
 class ClassTypesTest extends \PHPUnit\Framework\TestCase
 {
diff --git a/test/php/Nominatim/DBTest.php b/test/php/Nominatim/DBTest.php
index 1991f6f1..8a3157a8 100644
--- a/test/php/Nominatim/DBTest.php
+++ b/test/php/Nominatim/DBTest.php
@@ -2,8 +2,8 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/lib.php');
-require_once(CONST_BasePath.'/lib/DB.php');
+require_once(CONST_LibDir.'/lib.php');
+require_once(CONST_LibDir.'/DB.php');
 
 // subclassing so we can set the protected connection variable
 class NominatimSubClassedDB extends \Nominatim\DB
diff --git a/test/php/Nominatim/DatabaseErrorTest.php b/test/php/Nominatim/DatabaseErrorTest.php
index 7b461894..da156493 100644
--- a/test/php/Nominatim/DatabaseErrorTest.php
+++ b/test/php/Nominatim/DatabaseErrorTest.php
@@ -2,8 +2,8 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/init-website.php');
-require_once(CONST_BasePath.'/lib/DatabaseError.php');
+require_once(CONST_LibDir.'/init-website.php');
+require_once(CONST_LibDir.'/DatabaseError.php');
 
 class DatabaseErrorTest extends \PHPUnit\Framework\TestCase
 {
diff --git a/test/php/Nominatim/DebugTest.php b/test/php/Nominatim/DebugTest.php
index 5d9525ac..09860914 100644
--- a/test/php/Nominatim/DebugTest.php
+++ b/test/php/Nominatim/DebugTest.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/DebugHtml.php');
+require_once(CONST_LibDir.'/DebugHtml.php');
 
 class DebugTest extends \PHPUnit\Framework\TestCase
 {
diff --git a/test/php/Nominatim/LibTest.php b/test/php/Nominatim/LibTest.php
index 28cd9af0..6e9038ee 100644
--- a/test/php/Nominatim/LibTest.php
+++ b/test/php/Nominatim/LibTest.php
@@ -2,8 +2,8 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/lib.php');
-require_once(CONST_BasePath.'/lib/ClassTypes.php');
+require_once(CONST_LibDir.'/lib.php');
+require_once(CONST_LibDir.'/ClassTypes.php');
 
 class LibTest extends \PHPUnit\Framework\TestCase
 {
diff --git a/test/php/Nominatim/OutputTest.php b/test/php/Nominatim/OutputTest.php
index b243ba47..cbfebb7d 100644
--- a/test/php/Nominatim/OutputTest.php
+++ b/test/php/Nominatim/OutputTest.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/output.php');
+require_once(CONST_LibDir.'/output.php');
 
 class OutputTest extends \PHPUnit\Framework\TestCase
 {
diff --git a/test/php/Nominatim/ParameterParserTest.php b/test/php/Nominatim/ParameterParserTest.php
index 361fefc1..3b06e274 100644
--- a/test/php/Nominatim/ParameterParserTest.php
+++ b/test/php/Nominatim/ParameterParserTest.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/ParameterParser.php');
+require_once(CONST_LibDir.'/ParameterParser.php');
 
 
 function userError($sError)
diff --git a/test/php/Nominatim/PhraseTest.php b/test/php/Nominatim/PhraseTest.php
index ab031bb0..42166e34 100644
--- a/test/php/Nominatim/PhraseTest.php
+++ b/test/php/Nominatim/PhraseTest.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/Phrase.php');
+require_once(CONST_LibDir.'/Phrase.php');
 
 class TokensFullSet
 {
diff --git a/test/php/Nominatim/SearchContextTest.php b/test/php/Nominatim/SearchContextTest.php
index 2b575a16..1b346297 100644
--- a/test/php/Nominatim/SearchContextTest.php
+++ b/test/php/Nominatim/SearchContextTest.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/SearchContext.php');
+require_once(CONST_LibDir.'/SearchContext.php');
 
 class SearchContextTest extends \PHPUnit\Framework\TestCase
 {
diff --git a/test/php/Nominatim/ShellTest.php b/test/php/Nominatim/ShellTest.php
index d0222ee1..2d81b71d 100644
--- a/test/php/Nominatim/ShellTest.php
+++ b/test/php/Nominatim/ShellTest.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/Shell.php');
+require_once(CONST_LibDir.'/Shell.php');
 
 class ShellTest extends \PHPUnit\Framework\TestCase
 {
diff --git a/test/php/Nominatim/StatusTest.php b/test/php/Nominatim/StatusTest.php
index f45e6633..8cb8a703 100644
--- a/test/php/Nominatim/StatusTest.php
+++ b/test/php/Nominatim/StatusTest.php
@@ -2,8 +2,8 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/DB.php');
-require_once(CONST_BasePath.'/lib/Status.php');
+require_once(CONST_LibDir.'/DB.php');
+require_once(CONST_LibDir.'/Status.php');
 
 
 class StatusTest extends \PHPUnit\Framework\TestCase
diff --git a/test/php/Nominatim/TokenListTest.php b/test/php/Nominatim/TokenListTest.php
index ca43aabb..3ef4d84d 100644
--- a/test/php/Nominatim/TokenListTest.php
+++ b/test/php/Nominatim/TokenListTest.php
@@ -2,7 +2,7 @@
 
 namespace Nominatim;
 
-require_once(CONST_BasePath.'/lib/TokenList.php');
+require_once(CONST_LibDir.'/TokenList.php');
 
 
 class TokenTest extends \PHPUnit\Framework\TestCase
diff --git a/test/php/bootstrap.php b/test/php/bootstrap.php
index d6968717..3a36db38 100644
--- a/test/php/bootstrap.php
+++ b/test/php/bootstrap.php
@@ -1,4 +1,6 @@
 <?php
-    @define('CONST_BasePath', '../..');
+    @define('CONST_LibDir', '../../lib');
+    @define('CONST_DataDir', '../..');
+
     @define('CONST_Debug', true);
     @define('CONST_NoAccessControl', false);
diff --git a/utils/analyse_indexing.py b/utils/analyse_indexing.py
index d461f891..97cb6843 100755
--- a/utils/analyse_indexing.py
+++ b/utils/analyse_indexing.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 # SPDX-License-Identifier: GPL-2.0-only
 #
 # This file is part of Nominatim.
diff --git a/utils/check_import_finished.php b/utils/check_import_finished.php
index 5ec99b81..e28053be 100755
--- a/utils/check_import_finished.php
+++ b/utils/check_import_finished.php
@@ -1,6 +1,8 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-cmd.php');
+require_once(CONST_LibDir.'/init-cmd.php');
+
+loadSettings(getcwd());
 
 $term_colors = array(
                 'green' => "\033[92m",
@@ -35,7 +37,7 @@ if ($oDB->checkConnection()) {
     echo <<< END
     Hints:
     * Is the database server started?
-    * Check the CONST_Database_DSN variable in build/settings/local.php
+    * Check the NOMINATIM_DATABASE_DSN variable in your local .env
     * Try connecting to the database with the same settings
 
 END;
@@ -166,7 +168,7 @@ END;
 
 
 
-if (CONST_Use_US_Tiger_Data) {
+if (getSettingBool('USE_US_TIGER_DATA')) {
     echo 'Checking TIGER table exists ... ';
     if ($oDB->tableExists('location_property_tiger')) {
         $print_success();
diff --git a/utils/country_languages.php b/utils/country_languages.php
index 63f6525c..1a7ea616 100644
--- a/utils/country_languages.php
+++ b/utils/country_languages.php
@@ -1,6 +1,6 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-cmd.php');
+require_once(CONST_LibDir.'/init-cmd.php');
 
 ini_set('memory_limit', '800M');
 ini_set('display_errors', 'stderr');
@@ -11,10 +11,12 @@ $aCMDOptions
     array('help', 'h', 0, 1, 0, 0, false, 'Show Help'),
     array('quiet', 'q', 0, 1, 0, 0, 'bool', 'Quiet output'),
     array('verbose', 'v', 0, 1, 0, 0, 'bool', 'Verbose output'),
+    array('project-dir', '', 0, 1, 1, 1, 'realpath', 'Base directory of the Nominatim installation (default: .)'),
    );
 getCmdOpt($_SERVER['argv'], $aCMDOptions, $aCMDResult, true, true);
 
-include(CONST_Phrase_Config);
+loadSettings($aCMDResult['project-dir'] ?? getcwd());
+setupHTTPProxy();
 
 if (true) {
     $sURL = 'https://wiki.openstreetmap.org/wiki/Special:Export/Nominatim/Country_Codes';
diff --git a/utils/export.php b/utils/export.php
index ef55aab2..ae18891e 100644
--- a/utils/export.php
+++ b/utils/export.php
@@ -3,8 +3,8 @@
     // from a running nominatim instance as CSV data
 
 
-    require_once(CONST_BasePath.'/lib/init-cmd.php');
-    require_once(CONST_BasePath.'/lib/ParameterParser.php');
+    require_once(CONST_LibDir.'/init-cmd.php');
+    require_once(CONST_LibDir.'/ParameterParser.php');
     ini_set('memory_limit', '800M');
 
     $aCMDOptions = array(
@@ -21,6 +21,7 @@
                     array('restrict-to-osm-node', '', 0, 1, 1, 1, 'int', 'Export only objects that are children of this OSM node'),
                     array('restrict-to-osm-way', '', 0, 1, 1, 1, 'int', 'Export only objects that are children of this OSM way'),
                     array('restrict-to-osm-relation', '', 0, 1, 1, 1, 'int', 'Export only objects that are children of this OSM relation'),
+                    array('project-dir', '', 0, 1, 1, 1, 'realpath', 'Base directory of the Nominatim installation (default: .)'),
                     "\nAddress ranks: continent, country, state, county, city, suburb, street, path",
                     'Additional output types: postcode, placeid (placeid for each object)',
                     "\noutput-format must be a semicolon-separated list of address ranks. Multiple ranks",
@@ -30,6 +31,8 @@
                    );
     getCmdOpt($_SERVER['argv'], $aCMDOptions, $aCMDResult, true, true);
 
+    loadSettings($aCMDResult['project-dir'] ?? getcwd());
+
     $aRankmap = array(
                  'continent' => 1,
                  'country' => 4,
diff --git a/utils/query.php b/utils/query.php
index 6068c7c0..429b30ff 100644
--- a/utils/query.php
+++ b/utils/query.php
@@ -1,8 +1,8 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-cmd.php');
-require_once(CONST_BasePath.'/lib/Geocode.php');
-require_once(CONST_BasePath.'/lib/ParameterParser.php');
+require_once(CONST_LibDir.'/init-cmd.php');
+require_once(CONST_LibDir.'/Geocode.php');
+require_once(CONST_LibDir.'/ParameterParser.php');
 ini_set('memory_limit', '800M');
 
 $aCMDOptions
@@ -28,10 +28,30 @@ $aCMDOptions
    array('exclude_place_ids', '', 0, 1, 1, 1, 'string', 'Comma-separated list of place ids to exclude from results'),
    array('featureType', '', 0, 1, 1, 1, 'string', 'Restrict results to certain features (country, state,city,settlement)'),
    array('countrycodes', '', 0, 1, 1, 1, 'string', 'Comma-separated list of countries to restrict search to'),
-   array('viewbox', '', 0, 1, 1, 1, 'string', 'Prefer results in given view box')
+   array('viewbox', '', 0, 1, 1, 1, 'string', 'Prefer results in given view box'),
+
+   array('project-dir', '', 0, 1, 1, 1, 'realpath', 'Base directory of the Nominatim installation (default: .)'),
   );
 getCmdOpt($_SERVER['argv'], $aCMDOptions, $aCMDResult, true, true);
 
+loadSettings($aCMDResult['project-dir'] ?? getcwd());
+
+@define('CONST_Database_DSN', getSetting('DATABASE_DSN'));
+@define('CONST_Default_Language', getSetting('DEFAULT_LANGUAGE', false));
+@define('CONST_Log_DB', getSettingBool('LOG_DB'));
+@define('CONST_Log_File', getSetting('LOG_FILE', false));
+@define('CONST_Max_Word_Frequency', getSetting('MAX_WORD_FREQUENCY'));
+@define('CONST_NoAccessControl', getSettingBool('CORS_NOACCESSCONTROL'));
+@define('CONST_Places_Max_ID_count', getSetting('LOOKUP_MAX_COUNT'));
+@define('CONST_PolygonOutput_MaximumTypes', getSetting('POLYGON_OUTPUT_MAX_TYPES'));
+@define('CONST_Search_BatchMode', getSettingBool('SEARCH_BATCH_MODE'));
+@define('CONST_Search_NameOnlySearchFrequencyThreshold', getSetting('SEARCH_NAME_ONLY_THRESHOLD'));
+@define('CONST_Term_Normalization_Rules', getSetting('TERM_NORMALIZATION'));
+@define('CONST_Use_Aux_Location_data', getSettingBool('USE_AUX_LOCATION_DATA'));
+@define('CONST_Use_US_Tiger_Data', getSettingBool('USE_US_TIGER_DATA'));
+@define('CONST_MapIcon_URL', getSetting('MAPICON_URL', false));
+
+
 $oDB = new Nominatim\DB;
 $oDB->connect();
 
diff --git a/utils/setup.php b/utils/setup.php
index 7f476d5c..713fe561 100644
--- a/utils/setup.php
+++ b/utils/setup.php
@@ -1,8 +1,8 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-cmd.php');
-require_once(CONST_BasePath.'/lib/setup/SetupClass.php');
-require_once(CONST_BasePath.'/lib/setup_functions.php');
+require_once(CONST_LibDir.'/init-cmd.php');
+require_once(CONST_LibDir.'/setup/SetupClass.php');
+require_once(CONST_LibDir.'/setup_functions.php');
 ini_set('memory_limit', '800M');
 
 use Nominatim\Setup\SetupFunctions as SetupFunctions;
@@ -44,11 +44,15 @@ $aCMDOptions
    array('create-country-names', '', 0, 1, 0, 0, 'bool', 'Create default list of searchable country names'),
    array('drop', '', 0, 1, 0, 0, 'bool', 'Drop tables needed for updates, making the database readonly (EXPERIMENTAL)'),
    array('setup-website', '', 0, 1, 0, 0, 'bool', 'Used to compile environment variables for the website'),
+   array('project-dir', '', 0, 1, 1, 1, 'realpath', 'Base directory of the Nominatim installation (default: .)'),
   );
 
 // $aCMDOptions passed to getCmdOpt by reference
 getCmdOpt($_SERVER['argv'], $aCMDOptions, $aCMDResult, true, true);
 
+loadSettings($aCMDResult['project-dir'] ?? getcwd());
+setupHTTPProxy();
+
 $bDidSomething = false;
 
 //*******************************************************
@@ -114,7 +118,11 @@ if ($aCMDResult['load-data'] || $aCMDResult['all']) {
 
 if ($aCMDResult['import-tiger-data']) {
     $bDidSomething = true;
-    $oSetup->importTigerData();
+    $sTigerPath = getSetting('TIGER_DATA_PATH');
+    if (!$sTigerPath) {
+        $sTigerPath = CONST_DataDir.'/data/tiger';
+    }
+    $oSetup->importTigerData($sTigerPath);
 }
 
 if ($aCMDResult['calculate-postcodes'] || $aCMDResult['all']) {
diff --git a/utils/specialphrases.php b/utils/specialphrases.php
index 9e6c9d76..b1df6436 100644
--- a/utils/specialphrases.php
+++ b/utils/specialphrases.php
@@ -1,6 +1,6 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-cmd.php');
+require_once(CONST_LibDir.'/init-cmd.php');
 ini_set('memory_limit', '800M');
 ini_set('display_errors', 'stderr');
 
@@ -11,18 +11,24 @@ $aCMDOptions
    array('quiet', 'q', 0, 1, 0, 0, 'bool', 'Quiet output'),
    array('verbose', 'v', 0, 1, 0, 0, 'bool', 'Verbose output'),
    array('wiki-import', '', 0, 1, 0, 0, 'bool', 'Create import script for search phrases '),
+   array('project-dir', '', 0, 1, 1, 1, 'realpath', 'Base directory of the Nominatim installation (default: .)'),
   );
 getCmdOpt($_SERVER['argv'], $aCMDOptions, $aCMDResult, true, true);
 
-include(CONST_Phrase_Config);
+loadSettings($aCMDResult['project-dir'] ?? getcwd());
+setupHTTPProxy();
+
+include(getSettingConfig('PHRASE_CONFIG', 'phrase_settings.php'));
 
 if ($aCMDResult['wiki-import']) {
-    $oNormalizer = Transliterator::createFromRules(CONST_Term_Normalization_Rules);
+    $oNormalizer = Transliterator::createFromRules(getSetting('TERM_NORMALIZATION'));
     $aPairs = array();
 
-    $sLanguageIn = CONST_Languages ? CONST_Languages :
-        ('af,ar,br,ca,cs,de,en,es,et,eu,fa,fi,fr,gl,hr,hu,'.
-         'ia,is,it,ja,mk,nl,no,pl,ps,pt,ru,sk,sl,sv,uk,vi');
+    $sLanguageIn = getSetting(
+        'LANGUAGES',
+        'af,ar,br,ca,cs,de,en,es,et,eu,fa,fi,fr,gl,hr,hu,'.
+        'ia,is,it,ja,mk,nl,no,pl,ps,pt,ru,sk,sl,sv,uk,vi'
+    );
 
     foreach (explode(',', $sLanguageIn) as $sLanguage) {
         $sURL = 'https://wiki.openstreetmap.org/wiki/Special:Export/Nominatim/Special_Phrases/'.strtoupper($sLanguage);
@@ -103,7 +109,10 @@ if ($aCMDResult['wiki-import']) {
     echo 'CREATE INDEX idx_placex_classtype ON placex (class, type);';
 
     foreach ($aPairs as $aPair) {
-        $sql_tablespace = CONST_Tablespace_Aux_Data ? ' TABLESPACE '.CONST_Tablespace_Aux_Data : '';
+        $sql_tablespace = getSetting('TABLESPACE_AUX_DATA');
+        if ($sql_tablespace) {
+            $sql_tablespace = ' TABLESPACE '.$sql_tablespace;
+        }
 
         printf(
             'CREATE TABLE place_classtype_%s_%s'
@@ -145,7 +154,7 @@ if ($aCMDResult['wiki-import']) {
             . ";\n",
             pg_escape_string($aPair[0]),
             pg_escape_string($aPair[1]),
-            CONST_Database_Web_User
+            getSetting('DATABASE_WEBUSER')
         );
     }
 
diff --git a/utils/update.php b/utils/update.php
index 135bf193..931ca179 100644
--- a/utils/update.php
+++ b/utils/update.php
@@ -1,9 +1,9 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-cmd.php');
-require_once(CONST_BasePath.'/lib/setup_functions.php');
-require_once(CONST_BasePath.'/lib/setup/SetupClass.php');
-require_once(CONST_BasePath.'/lib/setup/AddressLevelParser.php');
+require_once(CONST_LibDir.'/init-cmd.php');
+require_once(CONST_LibDir.'/setup_functions.php');
+require_once(CONST_LibDir.'/setup/SetupClass.php');
+require_once(CONST_LibDir.'/setup/AddressLevelParser.php');
 
 ini_set('memory_limit', '800M');
 
@@ -41,11 +41,16 @@ $aCMDOptions
 
    array('recompute-word-counts', '', 0, 1, 0, 0, 'bool', 'Compute frequency of full-word search terms'),
    array('update-address-levels', '', 0, 1, 0, 0, 'bool', 'Reimport address level configuration (EXPERT)'),
-   array('recompute-importance', '', 0, 1, 0, 0, 'bool', 'Recompute place importances')
+   array('recompute-importance', '', 0, 1, 0, 0, 'bool', 'Recompute place importances'),
+
+   array('project-dir', '', 0, 1, 1, 1, 'realpath', 'Base directory of the Nominatim installation (default: .)'),
   );
 
 getCmdOpt($_SERVER['argv'], $aCMDOptions, $aResult, true, true);
 
+loadSettings($aCMDResult['project-dir'] ?? getcwd());
+setupHTTPProxy();
+
 if (!isset($aResult['index-instances'])) $aResult['index-instances'] = 1;
 if (!isset($aResult['index-rank'])) $aResult['index-rank'] = 0;
 
@@ -55,7 +60,7 @@ $oDB = new Nominatim\DB();
 $oDB->connect();
 $fPostgresVersion = $oDB->getPostgresVersion();
 
-$aDSNInfo = Nominatim\DB::parseDSN(CONST_Database_DSN);
+$aDSNInfo = Nominatim\DB::parseDSN(getSetting('DATABASE_DSN'));
 if (!isset($aDSNInfo['port']) || !$aDSNInfo['port']) $aDSNInfo['port'] = 5432;
 
 // cache memory to be used by osm2pgsql, should not be more than the available memory
@@ -65,7 +70,7 @@ if ($iCacheMemory + 500 > getTotalMemoryMB()) {
     echo "WARNING: resetting cache memory to $iCacheMemory\n";
 }
 
-$oOsm2pgsqlCmd = (new \Nominatim\Shell(CONST_Osm2pgsql_Binary))
+$oOsm2pgsqlCmd = (new \Nominatim\Shell(getOsm2pgsqlBinary()))
                  ->addParams('--hstore')
                  ->addParams('--latlong')
                  ->addParams('--append')
@@ -75,7 +80,7 @@ $oOsm2pgsqlCmd = (new \Nominatim\Shell(CONST_Osm2pgsql_Binary))
                  ->addParams('--number-processes', 1)
                  ->addParams('--cache', $iCacheMemory)
                  ->addParams('--output', 'gazetteer')
-                 ->addParams('--style', CONST_Import_Style)
+                 ->addParams('--style', getImportStyle())
                  ->addParams('--database', $aDSNInfo['database'])
                  ->addParams('--port', $aDSNInfo['port']);
 
@@ -88,8 +93,8 @@ if (isset($aDSNInfo['username']) && $aDSNInfo['username']) {
 if (isset($aDSNInfo['password']) && $aDSNInfo['password']) {
     $oOsm2pgsqlCmd->addEnvPair('PGPASSWORD', $aDSNInfo['password']);
 }
-if (!is_null(CONST_Osm2pgsql_Flatnode_File) && CONST_Osm2pgsql_Flatnode_File) {
-    $oOsm2pgsqlCmd->addParams('--flat-nodes', CONST_Osm2pgsql_Flatnode_File);
+if (getSetting('FLATNODE_FILE')) {
+    $oOsm2pgsqlCmd->addParams('--flat-nodes', getSetting('FLATNODE_FILE'));
 }
 if ($fPostgresVersion >= 11.0) {
     $oOsm2pgsqlCmd->addEnvPair(
@@ -99,7 +104,7 @@ if ($fPostgresVersion >= 11.0) {
 }
 
 
-$oIndexCmd = (new \Nominatim\Shell(CONST_BasePath.'/nominatim/nominatim.py'))
+$oIndexCmd = (new \Nominatim\Shell(CONST_DataDir.'/nominatim/nominatim.py'))
              ->addParams('--database', $aDSNInfo['database'])
              ->addParams('--port', $aDSNInfo['port'])
              ->addParams('--threads', $aResult['index-instances']);
@@ -119,31 +124,34 @@ if (isset($aDSNInfo['password']) && $aDSNInfo['password']) {
     $oIndexCmd->addEnvPair('PGPASSWORD', $aDSNInfo['password']);
 }
 
+$sPyosmiumBin = getSetting('PYOSMIUM_BINARY');
+$sBaseURL = getSetting('REPLICATION_URL');
+
 
 if ($aResult['init-updates']) {
     // sanity check that the replication URL is correct
-    $sBaseState = file_get_contents(CONST_Replication_Url.'/state.txt');
+    $sBaseState = file_get_contents($sBaseURL.'/state.txt');
     if ($sBaseState === false) {
         echo "\nCannot find state.txt file at the configured replication URL.\n";
         echo "Does the URL point to a directory containing OSM update data?\n\n";
         fail('replication URL not reachable.');
     }
     // sanity check for pyosmium-get-changes
-    if (!CONST_Pyosmium_Binary) {
-        echo "\nCONST_Pyosmium_Binary not configured.\n";
+    if (!$sPyosmiumBin) {
+        echo "\nNOMINATIM_PYOSMIUM_BINARY not configured.\n";
         echo "You need to install pyosmium and set up the path to pyosmium-get-changes\n";
-        echo "in your local settings file.\n\n";
-        fail('CONST_Pyosmium_Binary not configured');
+        echo "in your local .env file.\n\n";
+        fail('NOMINATIM_PYOSMIUM_BINARY not configured');
     }
 
     $aOutput = 0;
-    $oCMD = new \Nominatim\Shell(CONST_Pyosmium_Binary, '--help');
+    $oCMD = new \Nominatim\Shell($sPyosmiumBin, '--help');
     exec($oCMD->escapedCmd(), $aOutput, $iRet);
 
     if ($iRet != 0) {
         echo "Cannot execute pyosmium-get-changes.\n";
         echo "Make sure you have pyosmium installed correctly\n";
-        echo "and have set up CONST_Pyosmium_Binary to point to pyosmium-get-changes.\n";
+        echo "and have set up NOMINATIM_PYOSMIUM_BINARY to point to pyosmium-get-changes.\n";
         fail('pyosmium-get-changes not found or not usable');
     }
 
@@ -164,9 +172,9 @@ if ($aResult['init-updates']) {
 
     // get the appropriate state id
     $aOutput = 0;
-    $oCMD = (new \Nominatim\Shell(CONST_Pyosmium_Binary))
+    $oCMD = (new \Nominatim\Shell($sPyosmiumBin))
             ->addParams('--start-date', $sWindBack)
-            ->addParams('--server', CONST_Replication_Url);
+            ->addParams('--server', $sBaseURL);
 
     exec($oCMD->escapedCmd(), $aOutput, $iRet);
     if ($iRet != 0 || $aOutput[0] == 'None') {
@@ -193,8 +201,8 @@ if ($aResult['check-for-updates']) {
         fail('Updates not set up. Please run ./utils/update.php --init-updates.');
     }
 
-    $oCmd = (new \Nominatim\Shell(CONST_BasePath.'/utils/check_server_for_updates.py'))
-            ->addParams(CONST_Replication_Url)
+    $oCmd = (new \Nominatim\Shell(CONST_BinDir.'/check_server_for_updates.py'))
+            ->addParams($sBaseURL)
             ->addParams($aLastState['sequence_id']);
     $iRet = $oCmd->run();
 
@@ -223,11 +231,11 @@ if (isset($aResult['import-diff']) || isset($aResult['import-file'])) {
 
 if ($aResult['calculate-postcodes']) {
     info('Update postcodes centroids');
-    $sTemplate = file_get_contents(CONST_BasePath.'/sql/update-postcodes.sql');
+    $sTemplate = file_get_contents(CONST_DataDir.'/sql/update-postcodes.sql');
     runSQLScript($sTemplate, true, true);
 }
 
-$sTemporaryFile = CONST_BasePath.'/data/osmosischange.osc';
+$sTemporaryFile = CONST_InstallDir.'/osmosischange.osc';
 $bHaveDiff = false;
 $bUseOSMApi = isset($aResult['import-from-main-api']) && $aResult['import-from-main-api'];
 $sContentURL = '';
@@ -274,7 +282,7 @@ if ($bHaveDiff) {
 
 if ($aResult['recompute-word-counts']) {
     info('Recompute frequency of full-word search terms');
-    $sTemplate = file_get_contents(CONST_BasePath.'/sql/words_from_search_name.sql');
+    $sTemplate = file_get_contents(CONST_DataDir.'/sql/words_from_search_name.sql');
     runSQLScript($sTemplate, true, true);
 }
 
@@ -291,8 +299,9 @@ if ($aResult['index']) {
 }
 
 if ($aResult['update-address-levels']) {
-    echo 'Updating address levels from '.CONST_Address_Level_Config.".\n";
-    $oAlParser = new \Nominatim\Setup\AddressLevelParser(CONST_Address_Level_Config);
+    $sAddressLevelConfig = getSettingConfig('ADDRESS_LEVEL_CONFIG', 'address-levels.json');
+    echo 'Updating address levels from '.$sAddressLevelConfig.".\n";
+    $oAlParser = new \Nominatim\Setup\AddressLevelParser($sAddressLevelConfig);
     $oAlParser->createTable($oDB, 'address_levels');
 }
 
@@ -315,17 +324,17 @@ if ($aResult['recompute-importance']) {
 
 if ($aResult['import-osmosis'] || $aResult['import-osmosis-all']) {
     //
-    if (strpos(CONST_Replication_Url, 'download.geofabrik.de') !== false && CONST_Replication_Update_Interval < 86400) {
+    if (strpos($sBaseURL, 'download.geofabrik.de') !== false && getSetting('REPLICATION_UPDATE_INTERVAL') < 86400) {
         fail('Error: Update interval too low for download.geofabrik.de. ' .
              "Please check install documentation (https://nominatim.org/release-docs/latest/admin/Import-and-Update#setting-up-the-update-process)\n");
     }
 
-    $sImportFile = CONST_InstallPath.'/osmosischange.osc';
+    $sImportFile = CONST_InstallDir.'/osmosischange.osc';
 
-    $oCMDDownload = (new \Nominatim\Shell(CONST_Pyosmium_Binary))
-                    ->addParams('--server', CONST_Replication_Url)
+    $oCMDDownload = (new \Nominatim\Shell($sPyosmiumBin))
+                    ->addParams('--server', $sBaseURL)
                     ->addParams('--outfile', $sImportFile)
-                    ->addParams('--size', CONST_Replication_Max_Diff_size);
+                    ->addParams('--size', getSetting('REPLICATION_MAX_DIFF'));
 
     $oCMDImport = (clone $oOsm2pgsqlCmd)->addParams($sImportFile);
 
@@ -345,7 +354,7 @@ if ($aResult['import-osmosis'] || $aResult['import-osmosis-all']) {
 
         if ($aLastState['indexed']) {
             // Sleep if the update interval has not yet been reached.
-            $fNextUpdate = $aLastState['unix_ts'] + CONST_Replication_Update_Interval;
+            $fNextUpdate = $aLastState['unix_ts'] + getSetting('REPLICATION_UPDATE_INTERVAL');
             if ($fNextUpdate > $fStartTime) {
                 $iSleepTime = $fNextUpdate - $fStartTime;
                 echo "Waiting for next update for $iSleepTime sec.";
@@ -366,8 +375,9 @@ if ($aResult['import-osmosis'] || $aResult['import-osmosis-all']) {
                 exec($oCMD->escapedCmd(), $aOutput, $iResult);
 
                 if ($iResult == 3) {
-                    echo 'No new updates. Sleeping for '.CONST_Replication_Recheck_Interval." sec.\n";
-                    sleep(CONST_Replication_Recheck_Interval);
+                    $sSleep = getSetting('REPLICATION_RECHECK_INTERVAL');
+                    echo 'No new updates. Sleeping for '.$sSleep." sec.\n";
+                    sleep($sSleep);
                 } elseif ($iResult != 0) {
                     echo 'ERROR: updates failed.';
                     exit($iResult);
@@ -379,7 +389,7 @@ if ($aResult['import-osmosis'] || $aResult['import-osmosis-all']) {
             // get the newest object from the diff file
             $sBatchEnd = 0;
             $iRet = 0;
-            $oCMD = new \Nominatim\Shell(CONST_BasePath.'/utils/osm_file_date.py', $sImportFile);
+            $oCMD = new \Nominatim\Shell(CONST_BinDir.'/osm_file_date.py', $sImportFile);
             exec($oCMD->escapedCmd(), $sBatchEnd, $iRet);
             if ($iRet == 5) {
                 echo "Diff file is empty. skipping import.\n";
diff --git a/utils/warm.php b/utils/warm.php
index 5476eae0..0d8260f1 100644
--- a/utils/warm.php
+++ b/utils/warm.php
@@ -1,6 +1,11 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-cmd.php');
+require_once(CONST_LibDir.'/init-cmd.php');
+require_once(CONST_LibDir.'/log.php');
+require_once(CONST_LibDir.'/Geocode.php');
+require_once(CONST_LibDir.'/PlaceLookup.php');
+require_once(CONST_LibDir.'/ReverseGeocode.php');
+
 ini_set('memory_limit', '800M');
 
 $aCMDOptions = array(
@@ -10,13 +15,11 @@ $aCMDOptions = array(
                 array('verbose', 'v', 0, 1, 0, 0, 'bool', 'Verbose output'),
                 array('reverse-only', '', 0, 1, 0, 0, 'bool', 'Warm reverse only'),
                 array('search-only', '', 0, 1, 0, 0, 'bool', 'Warm search only'),
+                array('project-dir', '', 0, 1, 1, 1, 'realpath', 'Base directory of the Nominatim installation (default: .)'),
                );
 getCmdOpt($_SERVER['argv'], $aCMDOptions, $aResult, true, true);
 
-require_once(CONST_BasePath.'/lib/log.php');
-require_once(CONST_BasePath.'/lib/Geocode.php');
-require_once(CONST_BasePath.'/lib/PlaceLookup.php');
-require_once(CONST_BasePath.'/lib/ReverseGeocode.php');
+loadSettings($aCMDResult['project-dir'] ?? getcwd());
 
 $oDB = new Nominatim\DB();
 $oDB->connect();
diff --git a/vagrant/Install-on-Centos-7.sh b/vagrant/Install-on-Centos-7.sh
index c67aab7c..24b17663 100755
--- a/vagrant/Install-on-Centos-7.sh
+++ b/vagrant/Install-on-Centos-7.sh
@@ -6,6 +6,10 @@
 # Installing the Required Software
 # ================================
 #
+# !!! caution
+#     These instructions are currently broken because they do not
+#     include installation of the required PHP library symfony-dotenv.
+#
 # These instructions expect that you have a freshly installed CentOS version 7.
 # Make sure all packages are up-to-date by running:
 #
@@ -189,10 +193,7 @@ fi                                 #DOCS:
 # the name of your webserver user:
 
 #DOCS:```sh
-tee settings/local.php << EOF
-<?php
- @define('CONST_Database_Web_User', 'apache');
-EOF
+echo NOMINATIM_DATABASE_WEBUSER="apache" | tee .env
 #DOCS:```
 
 
diff --git a/vagrant/Install-on-Centos-8.sh b/vagrant/Install-on-Centos-8.sh
index 8559726b..517a5156 100755
--- a/vagrant/Install-on-Centos-8.sh
+++ b/vagrant/Install-on-Centos-8.sh
@@ -6,6 +6,10 @@
 # Installing the Required Software
 # ================================
 #
+# !!! caution
+#     These instructions are currently broken because they do not
+#     include installation of the required PHP library symfony-dotenv.
+#
 # These instructions expect that you have a freshly installed CentOS version 8.
 # Make sure all packages are up-to-date by running:
 #
@@ -26,7 +30,7 @@
 # Now you can install all packages needed for Nominatim:
 
 #DOCS:    :::sh
-    sudo dnf --enablerepo=PowerTools install -y postgresql12-server \
+    sudo dnf --enablerepo=powertools install -y postgresql12-server \
                         postgresql12-contrib postgresql12-devel postgis30_12 \
                         wget git cmake make gcc gcc-c++ libtool policycoreutils-python-utils \
                         llvm-toolset ccache clang-tools-extra \
@@ -183,10 +187,7 @@ fi                                 #DOCS:
 # the name of your webserver user:
 
 #DOCS:```sh
-tee settings/local.php << EOF
-<?php
- @define('CONST_Database_Web_User', 'apache');
-EOF
+echo NOMINATIM_DATABASE_WEBUSER="apache" | tee .env
 #DOCS:```
 
 
diff --git a/website/deletable.php b/website/deletable.php
index 2028cbdd..81fb4f99 100644
--- a/website/deletable.php
+++ b/website/deletable.php
@@ -1,15 +1,15 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-website.php');
-require_once(CONST_BasePath.'/lib/log.php');
-require_once(CONST_BasePath.'/lib/output.php');
+require_once(CONST_LibDir.'/init-website.php');
+require_once(CONST_LibDir.'/log.php');
+require_once(CONST_LibDir.'/output.php');
 ini_set('memory_limit', '200M');
 
 $oParams = new Nominatim\ParameterParser();
 $sOutputFormat = $oParams->getSet('format', array('json'), 'json');
 set_exception_handler_by_format($sOutputFormat);
 
-$oDB = new Nominatim\DB();
+$oDB = new Nominatim\DB(CONST_Database_DSN);
 $oDB->connect();
 
 $sSQL = 'select placex.place_id, country_code,';
diff --git a/website/details.php b/website/details.php
index 77e74969..91440b54 100644
--- a/website/details.php
+++ b/website/details.php
@@ -1,9 +1,9 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-website.php');
-require_once(CONST_BasePath.'/lib/log.php');
-require_once(CONST_BasePath.'/lib/output.php');
-require_once(CONST_BasePath.'/lib/AddressDetails.php');
+require_once(CONST_LibDir.'/init-website.php');
+require_once(CONST_LibDir.'/log.php');
+require_once(CONST_LibDir.'/output.php');
+require_once(CONST_LibDir.'/AddressDetails.php');
 ini_set('memory_limit', '200M');
 
 $oParams = new Nominatim\ParameterParser();
@@ -25,7 +25,7 @@ $bIncludeHierarchy = $oParams->getBool('hierarchy', false);
 $bGroupHierarchy = $oParams->getBool('group_hierarchy', false);
 $bIncludePolygonAsGeoJSON = $oParams->getBool('polygon_geojson', false);
 
-$oDB = new Nominatim\DB();
+$oDB = new Nominatim\DB(CONST_Database_DSN);
 $oDB->connect();
 
 $sLanguagePrefArraySQL = $oDB->getArraySQL($oDB->getDBQuotedList($aLangPrefOrder));
@@ -77,7 +77,7 @@ if ($sOsmType && $iOsmId > 0) {
                 $aPointDetails['error_x'] = 0;
                 $aPointDetails['error_y'] = 0;
             }
-            include(CONST_BasePath.'/lib/template/details-error-'.$sOutputFormat.'.php');
+            include(CONST_LibDir.'/template/details-error-'.$sOutputFormat.'.php');
             exit;
         }
     }
@@ -247,4 +247,4 @@ if ($bIncludeKeywords) {
 
 logEnd($oDB, $hLog, 1);
 
-include(CONST_BasePath.'/lib/template/details-'.$sOutputFormat.'.php');
+include(CONST_LibDir.'/template/details-'.$sOutputFormat.'.php');
diff --git a/website/lookup.php b/website/lookup.php
index db2c01d6..737edc62 100644
--- a/website/lookup.php
+++ b/website/lookup.php
@@ -1,9 +1,9 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-website.php');
-require_once(CONST_BasePath.'/lib/log.php');
-require_once(CONST_BasePath.'/lib/PlaceLookup.php');
-require_once(CONST_BasePath.'/lib/output.php');
+require_once(CONST_LibDir.'/init-website.php');
+require_once(CONST_LibDir.'/log.php');
+require_once(CONST_LibDir.'/PlaceLookup.php');
+require_once(CONST_LibDir.'/output.php');
 ini_set('memory_limit', '200M');
 
 $oParams = new Nominatim\ParameterParser();
@@ -15,7 +15,7 @@ set_exception_handler_by_format($sOutputFormat);
 // Preferred language
 $aLangPrefOrder = $oParams->getPreferredLanguages();
 
-$oDB = new Nominatim\DB();
+$oDB = new Nominatim\DB(CONST_Database_DSN);
 $oDB->connect();
 
 $hLog = logStart($oDB, 'place', $_SERVER['QUERY_STRING'], $aLangPrefOrder);
@@ -84,4 +84,4 @@ $sMoreURL = '';
 logEnd($oDB, $hLog, 1);
 
 $sOutputTemplate = ($sOutputFormat == 'jsonv2') ? 'json' : $sOutputFormat;
-include(CONST_BasePath.'/lib/template/search-'.$sOutputTemplate.'.php');
+include(CONST_LibDir.'/template/search-'.$sOutputTemplate.'.php');
diff --git a/website/polygons.php b/website/polygons.php
index 9c657a1d..88b48ae8 100644
--- a/website/polygons.php
+++ b/website/polygons.php
@@ -1,8 +1,8 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-website.php');
-require_once(CONST_BasePath.'/lib/log.php');
-require_once(CONST_BasePath.'/lib/output.php');
+require_once(CONST_LibDir.'/init-website.php');
+require_once(CONST_LibDir.'/log.php');
+require_once(CONST_LibDir.'/output.php');
 ini_set('memory_limit', '200M');
 
 $oParams = new Nominatim\ParameterParser();
@@ -13,7 +13,7 @@ $iDays = $oParams->getInt('days', false);
 $bReduced = $oParams->getBool('reduced', false);
 $sClass = $oParams->getString('class', false);
 
-$oDB = new Nominatim\DB();
+$oDB = new Nominatim\DB(CONST_Database_DSN);
 $oDB->connect();
 
 $iTotalBroken = (int) $oDB->getOne('SELECT count(*) FROM import_polygon_error');
diff --git a/website/reverse.php b/website/reverse.php
index 640ea2ab..553c2692 100644
--- a/website/reverse.php
+++ b/website/reverse.php
@@ -1,10 +1,10 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-website.php');
-require_once(CONST_BasePath.'/lib/log.php');
-require_once(CONST_BasePath.'/lib/PlaceLookup.php');
-require_once(CONST_BasePath.'/lib/ReverseGeocode.php');
-require_once(CONST_BasePath.'/lib/output.php');
+require_once(CONST_LibDir.'/init-website.php');
+require_once(CONST_LibDir.'/log.php');
+require_once(CONST_LibDir.'/PlaceLookup.php');
+require_once(CONST_LibDir.'/ReverseGeocode.php');
+require_once(CONST_LibDir.'/output.php');
 ini_set('memory_limit', '200M');
 
 $oParams = new Nominatim\ParameterParser();
@@ -16,7 +16,7 @@ set_exception_handler_by_format($sOutputFormat);
 // Preferred language
 $aLangPrefOrder = $oParams->getPreferredLanguages();
 
-$oDB = new Nominatim\DB();
+$oDB = new Nominatim\DB(CONST_Database_DSN);
 $oDB->connect();
 
 $hLog = logStart($oDB, 'reverse', $_SERVER['QUERY_STRING'], $aLangPrefOrder);
@@ -84,4 +84,4 @@ if ($sOutputFormat == 'geocodejson') {
 }
 
 $sOutputTemplate = ($sOutputFormat == 'jsonv2') ? 'json' : $sOutputFormat;
-include(CONST_BasePath.'/lib/template/address-'.$sOutputTemplate.'.php');
+include(CONST_LibDir.'/template/address-'.$sOutputTemplate.'.php');
diff --git a/website/search.php b/website/search.php
index 43c9fd01..619dec6d 100644
--- a/website/search.php
+++ b/website/search.php
@@ -1,12 +1,12 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-website.php');
-require_once(CONST_BasePath.'/lib/log.php');
-require_once(CONST_BasePath.'/lib/Geocode.php');
-require_once(CONST_BasePath.'/lib/output.php');
+require_once(CONST_LibDir.'/init-website.php');
+require_once(CONST_LibDir.'/log.php');
+require_once(CONST_LibDir.'/Geocode.php');
+require_once(CONST_LibDir.'/output.php');
 ini_set('memory_limit', '200M');
 
-$oDB = new Nominatim\DB();
+$oDB = new Nominatim\DB(CONST_Database_DSN);
 $oDB->connect();
 $oParams = new Nominatim\ParameterParser();
 
@@ -15,15 +15,6 @@ $oGeocode = new Nominatim\Geocode($oDB);
 $aLangPrefOrder = $oParams->getPreferredLanguages();
 $oGeocode->setLanguagePreference($aLangPrefOrder);
 
-if (CONST_Search_ReversePlanForAll
-    || isset($aLangPrefOrder['name:de'])
-    || isset($aLangPrefOrder['name:ru'])
-    || isset($aLangPrefOrder['name:ja'])
-    || isset($aLangPrefOrder['name:pl'])
-) {
-    $oGeocode->setReverseInPlan(true);
-}
-
 // Format for output
 $sOutputFormat = $oParams->getSet('format', array('xml', 'json', 'jsonv2', 'geojson', 'geocodejson'), 'jsonv2');
 set_exception_handler_by_format($sOutputFormat);
@@ -41,7 +32,7 @@ if (CONST_Search_BatchMode && isset($_GET['batch'])) {
         $aSearchResults = $oBatchGeocode->lookup();
         $aBatchResults[] = $aSearchResults;
     }
-    include(CONST_BasePath.'/lib/template/search-batch-json.php');
+    include(CONST_LibDir.'/template/search-batch-json.php');
     exit;
 }
 
@@ -89,4 +80,4 @@ if (isset($_SERVER['REQUEST_SCHEME'])
 if (CONST_Debug) exit;
 
 $sOutputTemplate = ($sOutputFormat == 'jsonv2') ? 'json' : $sOutputFormat;
-include(CONST_BasePath.'/lib/template/search-'.$sOutputTemplate.'.php');
+include(CONST_LibDir.'/template/search-'.$sOutputTemplate.'.php');
diff --git a/website/status.php b/website/status.php
index 0d483544..9f030fb3 100644
--- a/website/status.php
+++ b/website/status.php
@@ -1,13 +1,13 @@
 <?php
 
-require_once(CONST_BasePath.'/lib/init-website.php');
-require_once(CONST_BasePath.'/lib/ParameterParser.php');
-require_once(CONST_BasePath.'/lib/Status.php');
+require_once(CONST_LibDir.'/init-website.php');
+require_once(CONST_LibDir.'/ParameterParser.php');
+require_once(CONST_LibDir.'/Status.php');
 
 $oParams = new Nominatim\ParameterParser();
 $sOutputFormat = $oParams->getSet('format', array('text', 'json'), 'text');
 
-$oDB = new Nominatim\DB();
+$oDB = new Nominatim\DB(CONST_Database_DSN);
 
 if ($sOutputFormat == 'json') {
     header('content-type: application/json; charset=UTF-8');