root/include/class.cleanup.php

<?php</span>
<span class="code-lang">define('IN_CLEANUP', true);

class cleanup {

    function cleanup () {
        $this->initialize_cleanup();
    }

    function initialize_cleanup () {
        global $config, $db;

        $db->sql_return_on_error(true);

        if ( !isset($config['cleanup_lock']) ) {
            set_config('cleanup_lock', '0', true);
        }

        // make sure cleanup doesn't run multiple times in parallel
        if ( $config['cleanup_lock'] ) {
            // if the other process is running more than an half-hour already we have to assume it
            // aborted without cleaning the lock
            $time = explode(' ', $config['cleanup_lock']);
            $time = $time[0];

            if ( $time + 1800 >= time() ) {
                return;
            }
        }

        define('CLEANUP_ID', time() . ' ' . uniqid(rand(), true));

        $sql = 'UPDATE ' . CONFIG_TABLE . " SET value = '" . $db->sql_escape(CLEANUP_ID) . "' WHERE name = 'cleanup_lock' AND value = '" . $db->sql_escape($config['cleanup_lock']) . "'";
        if ( !($db->sql_query($sql)) ) {
            $this->write_errors ($sql, __LINE__, __FILE__);
        }

        // another cleanup process altered the table between script start and UPDATE query so exit
        if ( $db->sql_affectedrows() != 1 ) {
            return;
        }

        $db->sql_return_on_error(true);

        ignore_user_abort(1);
        if ( !ini_get('safe_mode') ) {
            @set_time_limit(0);
        }

        $this->_run_cleanup();

    }

    function _run_cleanup () {
        global $root_path, $config;

        require_once ($root_path . 'include/class.cleanup_types.php');

        $cleanup_types = new cleanup_types();
        $class_methods = get_class_methods(get_class($cleanup_types));

        foreach ( $class_methods AS $class_name ) {
            if ( isset($config['autoclean_interval' . $class_name]) && $config['autoclean_interval' . $class_name] && ( $config['autoclean_last_run' . $class_name] + $config['autoclean_interval' . $class_name] * 60 ) < time() ) {
                if ( DEFINED('DEBUG_EXTRA') ) {
                    write_log('Cleanup operation ' . $class_name . ' started', LOG_VIEW_SYSOP);
                }
                if ( !( $return = $cleanup_types->$class_name() ) ) {
                    write_log('Cleanup error. Operation ' . $class_name . ' dont exit propertly', LOG_VIEW_SYSOP);
                }
                if ( DEFINED('DEBUG_EXTRA') ) {
                    write_log('Cleanup operation ' . $class_name . ' ended', LOG_VIEW_SYSOP);
                }
                set_config('autoclean_last_run' . $class_name, time(), true);
            }
        }

        $this->_cleanup_end();
    }

    function _cleanup_end () {
        global $db, $cleanup_types;

        $sql = 'UPDATE ' . CONFIG_TABLE . " SET value = '0' WHERE name = 'cleanup_lock' AND value = '" . $db->sql_escape(CLEANUP_ID) . "'";
        $db->sql_query($sql);

        return;
    }
}
?>