replaced Magento default autoloader with new one that checks files for existence

Author: ma4nn

extension.neon

@@ -4,7 +4,9 @@ parameters:
         - */app/code/local/*/*/sql/*
     bootstrapFiles:
         - %currentWorkingDirectory%/htdocs/app/Mage.php
-        - %currentWorkingDirectory%/vendor/vianetz/phpstan-magento1/phpstan-bootstrap.php
+        - phpstan-bootstrap.php
+    typeAliases:
+        Mage_Catalog_Model_Entity_Product_Collection: 'Mage_Catalog_Model_Resource_Product_Collection'
 
 services:
     -

phpstan-bootstrap.php

@@ -7,8 +7,20 @@
 (new ModuleControllerAutoloader('core'))->register();
 (new ModuleControllerAutoloader('community'))->register();
 
-// workaround Magento's use of date phpdoc typehint for string type
-// better would be to implement the typehint to make it appear string type
-class date {}
+/**
+ * We replace the original Varien_Autoload autoloader with a custom one.
+ */
+spl_autoload_register(static function($className) {
+    spl_autoload_unregister([Varien_Autoload::instance(), 'autoload']);
+
+    $classFile = str_replace(' ', DIRECTORY_SEPARATOR, ucwords(str_replace('_', ' ', $className)));
+    $classFile .= '.php';
+
+    foreach (explode(':', get_include_path()) as $path) {
+        if (\file_exists($path . DIRECTORY_SEPARATOR . $classFile)) {
+            return include $classFile;
+        }
+    }
+}, true, true);
 
 Mage::app();