[ticket/12784] Allow the extensions to add a custom auto loader

PHPBB3-12784

phpBB/includes/functions.php

@@ -20,6 +20,33 @@ if (!defined('IN_PHPBB'))
 }
 
 // Common global functions
+/**
+* Load the autoloaders added by the extensions.
+*
+* @param string $phpbb_root_path Path to the phpbb root directory.
+*/
+function phpbb_load_extensions_autoloaders($phpbb_root_path)
+{
+	$iterator = new \RecursiveIteratorIterator(
+		new \phpbb\recursive_dot_prefix_filter_iterator(
+			new \RecursiveDirectoryIterator(
+				$phpbb_root_path . 'ext/',
+				\FilesystemIterator::SKIP_DOTS
+			)
+		),
+		\RecursiveIteratorIterator::SELF_FIRST
+	);
+	$iterator->setMaxDepth(3);
+
+	foreach ($iterator as $file_info)
+	{
+		if ($file_info->getFilename() === 'autoload.php' && $file_info->getPathInfo()->getFilename() === 'vendor')
+		{
+			require $file_info->getRealPath();
+		}
+	}
+}
+
 /**
 * Casts a variable to the given type.
 *