Github phpcs workflow

Author: XanderCalvert

.github/workflows/phpcs.yml

@@ -0,0 +1,44 @@
+name: PHP Code Sniffer
+
+on:
+  push:
+    branches: [ master, main ]
+  pull_request:
+    branches: [ master, main ]
+
+jobs:
+  phpcs:
+    name: Run PHPCS
+    runs-on: ubuntu-latest
+    
+    strategy:
+      matrix:
+        php-version: ['8.1', '8.2', '8.3']
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          coverage: none
+      
+      - name: Validate composer.json and composer.lock
+        run: composer validate --strict
+      
+      - name: Cache Composer dependencies
+        uses: actions/cache@v3
+        with:
+          path: /tmp/composer-cache
+          key: ${{ runner.os }}-php-${{ matrix.php-version }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-${{ matrix.php-version }}-composer-
+      
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress --no-interaction
+      
+      - name: Run PHPCS
+        run: vendor/bin/phpcs
+