3a1b732f51
git-svn-id: https://develop.svn.wordpress.org/trunk@19722 602fd350-edb4-49c9-b593-d223f7449a82
105 lines
2.7 KiB
PHP
105 lines
2.7 KiB
PHP
<?php
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/**
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* WordPress Cron Implementation for hosts, which do not offer CRON or for which
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* the user has not set up a CRON job pointing to this file.
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*
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* The HTTP request to this file will not slow down the visitor who happens to
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* visit when the cron job is needed to run.
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*
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* @package WordPress
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*/
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ignore_user_abort(true);
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if ( !empty($_POST) || defined('DOING_AJAX') || defined('DOING_CRON') )
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die();
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/**
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* Tell WordPress we are doing the CRON task.
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*
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* @var bool
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*/
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define('DOING_CRON', true);
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if ( !defined('ABSPATH') ) {
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/** Set up WordPress environment */
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require_once('./wp-load.php');
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}
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// Uncached doing_cron transient fetch
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function _get_cron_lock() {
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global $_wp_using_ext_object_cache, $wpdb;
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$value = 0;
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if ( $_wp_using_ext_object_cache ) {
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// Skip local cache and force refetch of doing_cron transient in case
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// another processs updated the cache
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$value = wp_cache_get( 'doing_cron', 'transient', true );
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} else {
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$row = $wpdb->get_row( $wpdb->prepare( "SELECT option_value FROM $wpdb->options WHERE option_name = %s LIMIT 1", '_transient_doing_cron' ) );
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if ( is_object( $row ) )
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$value = $row->option_value;
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}
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return $value;
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}
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if ( false === $crons = _get_cron_array() )
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die();
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$keys = array_keys( $crons );
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$local_time = microtime( true );
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if ( isset($keys[0]) && $keys[0] > $local_time )
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die();
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$doing_cron_transient = get_transient( 'doing_cron');
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// Use global $doing_wp_cron lock otherwise use the GET lock. If no lock, trying grabbing a new lock.
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if ( empty( $doing_wp_cron ) ) {
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if ( empty( $_GET[ 'doing_wp_cron' ] ) ) {
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// Called from external script/job. Try setting a lock.
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if ( $doing_cron_transient && ( $doing_cron_transient + WP_CRON_LOCK_TIMEOUT > $local_time ) )
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return;
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$doing_cron_transient = $doing_wp_cron = sprintf( '%.22F', microtime( true ) );
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set_transient( 'doing_cron', $doing_wp_cron );
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} else {
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$doing_wp_cron = $_GET[ 'doing_wp_cron' ];
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}
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}
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// Check lock
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if ( $doing_cron_transient != $doing_wp_cron )
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return;
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foreach ( $crons as $timestamp => $cronhooks ) {
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if ( $timestamp > $local_time )
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break;
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foreach ( $cronhooks as $hook => $keys ) {
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foreach ( $keys as $k => $v ) {
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$schedule = $v['schedule'];
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if ( $schedule != false ) {
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$new_args = array($timestamp, $schedule, $hook, $v['args']);
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call_user_func_array('wp_reschedule_event', $new_args);
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}
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wp_unschedule_event( $timestamp, $hook, $v['args'] );
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do_action_ref_array( $hook, $v['args'] );
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// If the hook ran too long and another cron process stole the lock, quit.
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if ( _get_cron_lock() != $doing_wp_cron )
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return;
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}
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}
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}
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if ( _get_cron_lock() == $doing_wp_cron )
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delete_transient( 'doing_cron' );
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die();
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