Create PHPMD.yml

PHPMD takes a given PHP source code base and looks for several potential problems within that source. These problems can be things like:
- Possible bugs
- Suboptimal code
- Overcomplicated expressions
- Unused parameters, methods, properties

.github/workflows/PHPMD.yml

@@ -0,0 +1,35 @@
+name: PHP Mess Detector
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
+permissions:
+  contents: read
+jobs:
+  PHPMD:
+    name: Run PHPMD scanning
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
+      actions: read
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Setup PHP
+        uses: shivammathur/setup-php@2.3.1
+        with:
+          php-version: 8.3
+          coverage: none
+          tools: phpmd
+      - name: Run PHPMD
+        run: phpmd . sarif phpmd.xml --reportfile phpmd-results.sarif
+        continue-on-error: true
+      - name: Upload analysis results to GitHub
+        uses: github/codeql-action/upload-sarif@v3.27.0
+        with:
+          sarif_file: phpmd-results.sarif
+          wait-for-processing: true