ci: check phpdoc build in quality workflow

.github/workflows/quality.yml

@@ -51,3 +51,13 @@ jobs:
           pip install -r requirements.txt
       - name: Run pylint
         run: pylint $(git ls-files '*.py')
+
+  check_phpdoc:
+    runs-on: ubuntu-latest
+    needs: ["lint_php"]
+    steps:
+      - name: Check phpdoc build
+        run: |
+          wget https://phpdoc.org/phpDocumentor.phar -O phpdoc
+          chmod +x ./phpdoc
+          ./phpdoc