note phpcs command in contribution readme

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 68355663373496b681669903ed40459b8f941872..d23b33928698eeb97975ac0fe4b188856d8acc81 100644 (file)
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -27,9 +27,11 @@ are in process of consolodating the style. The following rules apply:
    * leave out space between a function name and bracket
      but add one between control statement(if, while, etc.) and bracket
 
-This coding style must be applied to any new or changed code. You are also
-welcome to fix the coding style of existing code but please submit separate
-PRs for this.
+The coding style is enforced with PHPCS and can be tested with:
+
+```
+  phpcs --report-width=120 --colors */**.php
+```
 
 ## Testing