Merge pull request #730 from WordPress/add/phpstan

.github/workflows/php-lint.yml

@@ -10,6 +10,7 @@ on:
       - '.github/workflows/php-lint.yml'
       - '**.php'
       - 'phpcs.xml.dist'
+      - 'phpstan.neon.dist'
       - 'composer.json'
       - 'composer.lock'
   pull_request:
@@ -22,6 +23,7 @@ on:
       - '.github/workflows/php-lint.yml'
       - '**.php'
       - 'phpcs.xml.dist'
+      - 'phpstan.neon.dist'
       - 'composer.json'
       - 'composer.lock'
     types:
@@ -56,3 +58,5 @@ jobs:
         run: composer install --no-interaction --no-progress
       - name: PHP Lint
         run: composer lint
+      - name: PHPStan
+        run: composer phpstan

composer.json

@@ -14,17 +14,23 @@
   "require-dev": {
     "dealerdirect/phpcodesniffer-composer-installer": "^0.7",
     "phpcompatibility/php-compatibility": "^9.3",
+    "phpstan/extension-installer": "^1.3.0",
+    "phpstan/phpstan": "^1.10",
     "phpunit/phpunit": "^4|^5|^6|^7|^8|^9",
     "squizlabs/php_codesniffer": "^3.5",
+    "szepeviktor/phpstan-wordpress": "^1.3.0",
     "wp-coding-standards/wpcs": "^2.2",
     "wp-phpunit/wp-phpunit": "^5.8",
-    "yoast/phpunit-polyfills": "^1.0"
+    "yoast/phpunit-polyfills": "^1.0",
+    "phpstan/phpstan-phpunit": "^1.3",
+    "phpstan/phpstan-deprecation-rules": "^1.1"
   },
   "require": {
     "composer/installers": "~1.0",
     "php": ">=5.6|^7|^8"
   },
   "scripts": {
+    "phpstan": "phpstan analyze --ansi",
     "format": "phpcbf --standard=phpcs.xml.dist --report-summary --report-source",
     "lint": "phpcs --standard=phpcs.xml.dist",
     "test": "phpunit -c phpunit.xml.dist --verbose",
@@ -33,7 +39,8 @@
   "config": {
     "allow-plugins": {
       "dealerdirect/phpcodesniffer-composer-installer": true,
-      "composer/installers": true
+      "composer/installers": true,
+      "phpstan/extension-installer": true
     }
   },
   "autoload-dev": {