1 files changed, 37 insertions, 2 deletions
diff --git a/phpBB/includes/extension/interface.php b/phpBB/includes/extension/interface.php
index 40a5a066a3..7d0ecd72c7 100644
--- a/phpBB/includes/extension/interface.php
+++ b/phpBB/includes/extension/interface.php
@@ -16,12 +16,47 @@ if (!defined('IN_PHPBB'))
 }
 
 /**
+* The interface extension meta classes have to implement to run custom code
+* on enable/disable/purge.
 *
 * @package extension
 */
 interface phpbb_extension_interface
 {
-	public function enable();
+	/**
+	* enable_step is executed on enabling an extension until it returns false.
+	*
+	* Calls to this function can be made in subsequent requests, when the
+	* function is invoked through a webserver with a too low max_execution_time.
+	*
+	* @param	mixed	$old_state	The return value of the previous call
+	*								of this method, or false on the first call
+	* @return	mixed				Returns false after last step, otherwise
+	*								temporary state which is passed as an
+	*								argument to the next step
+	*/
+	public function enable_step($old_state);
+
+	/**
+	* Disables the extension.
+	*
+	* Must be a quick operation, that finishes within max_execution_time.
+	*
+	* @return null
+	*/
 	public function disable();
-	public function purge();
+
+	/**
+	* purge_step is executed on purging an extension until it returns false.
+	*
+	* Calls to this function can be made in subsequent requests, when the
+	* function is invoked through a webserver with a too low max_execution_time.
+	*
+	* @param	mixed	$old_state	The return value of the previous call
+	*								of this method, or false on the first call
+	* @return	mixed				Returns false after last step, otherwise
+	*								temporary state which is passed as an
+	*								argument to the next step
+	*/
+	public function purge_step($old_state);
 }