Test on PHP 8.1 (#4)

* Test on PHP 8.1

* Ensure test actually fails

* Make it easier to see if test has worked

* Better test

* Fix better test

Author: alexpott

.github/workflows/test.yml

@@ -8,15 +8,16 @@ jobs:
   test:
     strategy:
       matrix:
-        PHP_VERSION: [ '7.3', '7.4', '8.0']
+        PHP_VERSION: [ '7.3', '7.4', '8.0', '8.1']
     name: Test Apache action
     runs-on: ubuntu-latest
     steps:
       - name: Create fake site
         run: |
           mkdir /tmp/sut
           echo '<?php' | sudo tee /tmp/sut/index.php
-          echo '  print "<strong>Hello World</strong>";' | sudo tee -a /tmp/sut/index.php
+          echo '  $text = "It works!";' | sudo tee -a /tmp/sut/index.php
+          echo '  print "<strong>$text</strong>";' | sudo tee -a /tmp/sut/index.php
         shell: bash
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
@@ -31,4 +32,4 @@ jobs:
           http-port: 9090
       - name: Test fake site
         run: |
-          curl -sSf http://127.0.0.1:9090 > /dev/null
+          curl -sSf http://127.0.0.1:9090