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msd2/phpBB3/phpbb/extension/extension_interface.php

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+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\extension;
+
+/**
+* The interface extension meta classes have to implement to run custom code
+* on enable/disable/purge.
+*/
+interface extension_interface
+{
+	/**
+	* Indicate whether or not the extension can be enabled.
+	*
+	* @return bool
+	*/
+	public function is_enableable();
+
+	/**
+	* 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.
+	*
+	* 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	$old_state	The return value of the previous call
+	*								of this method, or false on the first call
+	* @return	mixed				Returns false after last step, otherwise
+	*								temporary state which is passed as an
+	*								argument to the next step
+	*/
+	public function disable_step($old_state);
+
+	/**
+	* 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);
+}