ext.php

<?php
/**
 *
 * Pages extension for the phpBB Forum Software package.
 *
 * @copyright (c) 2015 phpBB Limited <https://www.phpbb.com>
 * @license GNU General Public License, version 2 (GPL-2.0)
 *
 */

namespace phpbb\pages;

/**
* This ext class is optional and can be omitted if left empty.
* However, you can add special (un)installation commands in the
* methods enable_step(), disable_step() and purge_step(). As it is,
* these methods are defined in \phpbb\extension\base, which this
* class extends, but you can overwrite them to give special
* instructions for those cases.
*/
class ext extends \phpbb\extension\base
{
	/**
	 * Check whether the extension can be enabled.
	 * The current phpBB version should meet or exceed
	 * the minimum version required by this extension:
	 *
	 * Requires phpBB 3.3.2 due to using role_exists check in permission migration.
	 * Not compatible with phpBB 4.0.0-dev due to using updated classes.
	 *
	 * @return bool
	 * @access public
	 */
	public function is_enableable()
	{
		return phpbb_version_compare(PHPBB_VERSION, '3.3.2', '>=')
			&& phpbb_version_compare(PHPBB_VERSION, '4.0.0-dev', '<');
	}
}