Testing PHP 7.1 workflow execution

.github/workflows/php.yml

@@ -2,41 +2,43 @@ name: PHP Composer
 
 on:
   push:
-    branches: [ "main" ]
+    branches: ['main']
   pull_request:
-    branches: [ "main" ]
+    branches: ['main']
 
 permissions:
   contents: read
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
-
-    - name: Validate composer.json and composer.lock
-      run: composer validate --strict
-
-    - name: Cache Composer packages
-      id: composer-cache
-      uses: actions/cache@v3
-      with:
-        path: vendor
-        key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
-        restore-keys: |
-          ${{ runner.os }}-php-
-
-    - name: Install dependencies
-      run: composer install --prefer-dist --no-progress
-
-    # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
-    # Docs: https://getcomposer.org/doc/articles/scripts.md
-
-    - name: Run test suite
-      run: composer run-script test
-
-    - name: Run linter
-      run: composer lint
+      - uses: actions/checkout@v3
+      - uses: shivammathur/setup-php@v2
+        with:
+          php-version: '7.1'
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate --strict
+
+      - name: Cache Composer packages
+        id: composer-cache
+        uses: actions/cache@v3
+        with:
+          path: vendor
+          key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-php-
+
+      - name: Install dependencies
+        run: composer install --prefer-dist --no-progress
+
+      # Add a test script to composer.json, for instance: "test": "vendor/bin/phpunit"
+      # Docs: https://getcomposer.org/doc/articles/scripts.md
+
+      - name: Run test suite
+        run: composer run-script test
+
+      - name: Run linter
+        run: composer lint