add php server syntax check worfklow

Author: wing328

.github/workflows/samples-php-server-syntax-check.yaml

@@ -0,0 +1,33 @@
+name: Samples PHP (Server) Syntax Checker
+
+on:
+  push:
+    paths:
+      - https://github.com/OpenAPITools/openapi-generator/tree/master/samples/server/petstore/php-symfony/SymfonyBundle-php/**
+  pull_request:
+    paths:
+      - https://github.com/OpenAPITools/openapi-generator/tree/master/samples/server/petstore/php-symfony/SymfonyBundle-php/**
+jobs:
+  build:
+    name: Build PHP projects
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php:
+          - "8.1"
+          - "8.2"
+          - "8.3"
+          - "8.4"
+        sample:
+          # servers
+          - https://github.com/OpenAPITools/openapi-generator/tree/master/samples/server/petstore/php-symfony/SymfonyBundle-php/**
+    steps:
+      - uses: actions/checkout@v5
+      - name: Setup PHP with tools
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: "${{ matrix.php }}"
+      - name: php -l
+        working-directory: ${{ matrix.sample }}
+        run: find . -name "*.php" -exec php -l {} +

samples/server/petstore/php-symfony/.openapi-generator-ignore

@@ -22,3 +22,4 @@
 # Then explicitly reverse the ignore rule for a single file:
 #!docs/README.md
 #
+#