Add a phpstan job in the CI setup

.gitattributes

@@ -7,6 +7,7 @@
 /.gitignore export-ignore
 /.travis.yml export-ignore
 /phpunit.xml.dist export-ignore
+/phpstan.dist.neon export-ignore
 /CHANGELOG.md export-ignore
 /README.md export-ignore
 /.github export-ignore

.github/workflows/ci.yml

@@ -51,3 +51,18 @@ jobs:
       - name: Upload code coverage
         continue-on-error: true
         run: wget https://scrutinizer-ci.com/ocular.phar && php ocular.phar code-coverage:upload --format=php-clover coverage.clover
+
+  static_analysis:
+    name: Static analysis
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: "none"
+          php-version: "8.3"
+          ini-file: development
+      - name: Install dependencies
+        run: composer update --ansi --no-progress
+      - name: Run phpstan
+        run: vendor/bin/phpstan analyse --ansi --no-progress

.gitignore

@@ -1,3 +1,4 @@
 /vendor
 composer.lock
 /.phpunit.result.cache
+/phpunit.neon

composer.json

@@ -18,7 +18,9 @@
     "symfony/css-selector": "^5.4 || ^6.0 || ^7.0"
   },
   "require-dev": {
-    "phpunit/phpunit": "^8.5.21 || ^9.5.10"
+    "phpunit/phpunit": "^8.5.21 || ^9.5.10",
+    "phpstan/phpstan": "^2.0",
+    "phpstan/phpstan-phpunit": "^2.0"
   },
   "autoload": {
     "psr-4": {

phpstan.dist.neon

@@ -0,0 +1,11 @@
+parameters:
+    level: 10
+    treatPhpDocTypesAsCertain: false
+    paths:
+        - ./src/
+        - ./tests/
+
+includes:
+    - vendor/phpstan/phpstan/conf/bleedingEdge.neon
+    - vendor/phpstan/phpstan-phpunit/extension.neon
+    - vendor/phpstan/phpstan-phpunit/rules.neon