Example application

Author: Greg Bowler

README.md

@@ -23,10 +23,15 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: php-actions/composer@v1 # or alternative dependency management
-    - uses: php-actions/phpunit@v8
+    - uses: php-actions/phpunit@v9
     # ... then your own project steps ...
 ```
 
+Example
+-------
+
+We've put together an extremely simple example application that uses `php-actions/phpunit`. Check it out here: https://github.com/php-actions/example-phpunit.
+
 Inputs
 ------
 
@@ -48,7 +53,7 @@ jobs:
     ...
 
     - name: PHPUnit tests
-      uses: php-actions/phpunit@v8
+      uses: php-actions/phpunit@v9
       with:
         config: custom/path/to/phpunit.xml
         memory: 256M
@@ -66,6 +71,8 @@ Current versions supported by this Action:
 + 9.*
 + 8.*
 
+Please note **the version number of the Github Action must match your composer.json major version number**. For example, if your composer.json requires `phpunit/phpunit 8.5.8`, you must use `php-actions/phpunit@v8`, as major versions of PHPUnit are incompatible with each other.  
+
 If you require a specific version that is not listed here, please request them in the [Github issue tracker](https://github.com/php-actions/phpunit/issues)
 
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