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580ca68e26
Invalid timestamps were previously accepted by the scheduling functions but would never be run due to our implementation which caused the cron option to forever contain the events. This rejects such events which most likely only occur due to developer error. Props utkarshpatel, wonderboymusic, SergeyBiryukov. See #33423, Fixes #33475 Built from https://develop.svn.wordpress.org/trunk@33936 git-svn-id: http://core.svn.wordpress.org/trunk@33905 1a063a9b-81f0-0310-95a4-ce76da25c4cd
490 lines
14 KiB
PHP
490 lines
14 KiB
PHP
<?php
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/**
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* WordPress CRON API
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*
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* @package WordPress
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*/
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/**
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* Schedules a hook to run only once.
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*
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* Schedules a hook which will be executed once by the WordPress actions core at
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* a time which you specify. The action will fire off when someone visits your
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* WordPress site, if the schedule time has passed.
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*
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* @since 2.1.0
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* @link https://codex.wordpress.org/Function_Reference/wp_schedule_single_event
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*
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* @param int $timestamp Timestamp for when to run the event.
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* @param string $hook Action hook to execute when cron is run.
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* @param array $args Optional. Arguments to pass to the hook's callback function.
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* @return false|void False when an event is not scheduled.
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*/
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function wp_schedule_single_event( $timestamp, $hook, $args = array()) {
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// Make sure timestamp is a positive integer
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if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) {
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return false;
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}
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// Don't schedule a duplicate if there's already an identical event due within 10 minutes of it
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$next = wp_next_scheduled($hook, $args);
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if ( $next && abs( $next - $timestamp ) <= 10 * MINUTE_IN_SECONDS ) {
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return false;
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}
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$crons = _get_cron_array();
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$event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => false, 'args' => $args );
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/**
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* Filter a single event before it is scheduled.
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*
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* @since 3.1.0
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*
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* @param object $event An object containing an event's data.
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*/
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$event = apply_filters( 'schedule_event', $event );
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// A plugin disallowed this event
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if ( ! $event )
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return false;
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$key = md5(serialize($event->args));
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$crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args );
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uksort( $crons, "strnatcasecmp" );
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_set_cron_array( $crons );
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}
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/**
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* Schedule a periodic event.
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*
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* Schedules a hook which will be executed by the WordPress actions core on a
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* specific interval, specified by you. The action will trigger when someone
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* visits your WordPress site, if the scheduled time has passed.
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*
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* Valid values for the recurrence are hourly, daily and twicedaily. These can
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* be extended using the cron_schedules filter in wp_get_schedules().
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*
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* Use wp_next_scheduled() to prevent duplicates
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*
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* @since 2.1.0
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*
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* @param int $timestamp Timestamp for when to run the event.
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* @param string $recurrence How often the event should recur.
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* @param string $hook Action hook to execute when cron is run.
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* @param array $args Optional. Arguments to pass to the hook's callback function.
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* @return false|void False when an event is not scheduled.
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*/
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function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array()) {
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// Make sure timestamp is a positive integer
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if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) {
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return false;
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}
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$crons = _get_cron_array();
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$schedules = wp_get_schedules();
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if ( !isset( $schedules[$recurrence] ) )
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return false;
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$event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => $recurrence, 'args' => $args, 'interval' => $schedules[$recurrence]['interval'] );
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/** This filter is documented in wp-includes/cron.php */
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$event = apply_filters( 'schedule_event', $event );
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// A plugin disallowed this event
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if ( ! $event )
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return false;
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$key = md5(serialize($event->args));
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$crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args, 'interval' => $event->interval );
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uksort( $crons, "strnatcasecmp" );
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_set_cron_array( $crons );
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}
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/**
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* Reschedule a recurring event.
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*
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* @since 2.1.0
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*
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* @param int $timestamp Timestamp for when to run the event.
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* @param string $recurrence How often the event should recur.
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* @param string $hook Action hook to execute when cron is run.
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* @param array $args Optional. Arguments to pass to the hook's callback function.
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* @return false|void False when an event is not scheduled.
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*/
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function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array() ) {
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// Make sure timestamp is a positive integer
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if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) {
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return false;
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}
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$crons = _get_cron_array();
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$schedules = wp_get_schedules();
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$key = md5( serialize( $args ) );
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$interval = 0;
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// First we try to get it from the schedule
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if ( isset( $schedules[ $recurrence ] ) ) {
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$interval = $schedules[ $recurrence ]['interval'];
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}
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// Now we try to get it from the saved interval in case the schedule disappears
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if ( 0 == $interval ) {
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$interval = $crons[ $timestamp ][ $hook ][ $key ]['interval'];
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}
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// Now we assume something is wrong and fail to schedule
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if ( 0 == $interval ) {
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return false;
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}
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$now = time();
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if ( $timestamp >= $now ) {
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$timestamp = $now + $interval;
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} else {
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$timestamp = $now + ( $interval - ( ( $now - $timestamp ) % $interval ) );
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}
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wp_schedule_event( $timestamp, $recurrence, $hook, $args );
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}
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/**
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* Unschedule a previously scheduled cron job.
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*
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* The $timestamp and $hook parameters are required, so that the event can be
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* identified.
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*
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* @since 2.1.0
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*
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* @param int $timestamp Timestamp for when to run the event.
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* @param string $hook Action hook, the execution of which will be unscheduled.
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* @param array $args Arguments to pass to the hook's callback function.
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* Although not passed to a callback function, these arguments are used
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* to uniquely identify the scheduled event, so they should be the same
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* as those used when originally scheduling the event.
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*/
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function wp_unschedule_event( $timestamp, $hook, $args = array() ) {
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// Make sure timestamp is a positive integer
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if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) {
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return false;
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}
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$crons = _get_cron_array();
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$key = md5(serialize($args));
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unset( $crons[$timestamp][$hook][$key] );
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if ( empty($crons[$timestamp][$hook]) )
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unset( $crons[$timestamp][$hook] );
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if ( empty($crons[$timestamp]) )
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unset( $crons[$timestamp] );
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_set_cron_array( $crons );
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}
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/**
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* Unschedule all cron jobs attached to a specific hook.
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*
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* @since 2.1.0
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*
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* @param string $hook Action hook, the execution of which will be unscheduled.
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* @param array $args Optional. Arguments that were to be pass to the hook's callback function.
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*/
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function wp_clear_scheduled_hook( $hook, $args = array() ) {
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// Backward compatibility
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// Previously this function took the arguments as discrete vars rather than an array like the rest of the API
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if ( !is_array($args) ) {
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_deprecated_argument( __FUNCTION__, '3.0', __('This argument has changed to an array to match the behavior of the other cron functions.') );
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$args = array_slice( func_get_args(), 1 );
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}
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// This logic duplicates wp_next_scheduled()
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// It's required due to a scenario where wp_unschedule_event() fails due to update_option() failing,
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// and, wp_next_scheduled() returns the same schedule in an infinite loop.
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$crons = _get_cron_array();
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if ( empty( $crons ) )
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return;
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$key = md5( serialize( $args ) );
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foreach ( $crons as $timestamp => $cron ) {
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if ( isset( $cron[ $hook ][ $key ] ) ) {
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wp_unschedule_event( $timestamp, $hook, $args );
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}
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}
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}
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/**
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* Retrieve the next timestamp for a cron event.
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*
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* @since 2.1.0
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*
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* @param string $hook Action hook to execute when cron is run.
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* @param array $args Optional. Arguments to pass to the hook's callback function.
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* @return false|int The UNIX timestamp of the next time the scheduled event will occur.
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*/
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function wp_next_scheduled( $hook, $args = array() ) {
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$crons = _get_cron_array();
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$key = md5(serialize($args));
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if ( empty($crons) )
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return false;
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foreach ( $crons as $timestamp => $cron ) {
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if ( isset( $cron[$hook][$key] ) )
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return $timestamp;
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}
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return false;
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}
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/**
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* Send request to run cron through HTTP request that doesn't halt page loading.
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*
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* @since 2.1.0
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*/
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function spawn_cron( $gmt_time = 0 ) {
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if ( ! $gmt_time )
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$gmt_time = microtime( true );
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if ( defined('DOING_CRON') || isset($_GET['doing_wp_cron']) )
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return;
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/*
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* Get the cron lock, which is a unix timestamp of when the last cron was spawned
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* and has not finished running.
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*
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* Multiple processes on multiple web servers can run this code concurrently,
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* this lock attempts to make spawning as atomic as possible.
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*/
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$lock = get_transient('doing_cron');
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if ( $lock > $gmt_time + 10 * MINUTE_IN_SECONDS )
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$lock = 0;
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// don't run if another process is currently running it or more than once every 60 sec.
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if ( $lock + WP_CRON_LOCK_TIMEOUT > $gmt_time )
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return;
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//sanity check
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$crons = _get_cron_array();
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if ( !is_array($crons) )
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return;
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$keys = array_keys( $crons );
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if ( isset($keys[0]) && $keys[0] > $gmt_time )
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return;
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if ( defined( 'ALTERNATE_WP_CRON' ) && ALTERNATE_WP_CRON ) {
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if ( ! empty( $_POST ) || defined( 'DOING_AJAX' ) || defined( 'XMLRPC_REQUEST' ) ) {
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return;
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}
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$doing_wp_cron = sprintf( '%.22F', $gmt_time );
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set_transient( 'doing_cron', $doing_wp_cron );
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ob_start();
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wp_redirect( add_query_arg( 'doing_wp_cron', $doing_wp_cron, wp_unslash( $_SERVER['REQUEST_URI'] ) ) );
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echo ' ';
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// flush any buffers and send the headers
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while ( @ob_end_flush() );
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flush();
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WP_DEBUG ? include_once( ABSPATH . 'wp-cron.php' ) : @include_once( ABSPATH . 'wp-cron.php' );
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return;
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}
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// Set the cron lock with the current unix timestamp, when the cron is being spawned.
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$doing_wp_cron = sprintf( '%.22F', $gmt_time );
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set_transient( 'doing_cron', $doing_wp_cron );
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/**
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* Filter the cron request arguments.
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*
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* @since 3.5.0
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*
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* @param array $cron_request_array {
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* An array of cron request URL arguments.
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*
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* @type string $url The cron request URL.
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* @type int $key The 22 digit GMT microtime.
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* @type array $args {
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* An array of cron request arguments.
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*
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* @type int $timeout The request timeout in seconds. Default .01 seconds.
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* @type bool $blocking Whether to set blocking for the request. Default false.
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* @type bool $sslverify Whether SSL should be verified for the request. Default false.
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* }
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* }
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*/
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$cron_request = apply_filters( 'cron_request', array(
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'url' => add_query_arg( 'doing_wp_cron', $doing_wp_cron, site_url( 'wp-cron.php' ) ),
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'key' => $doing_wp_cron,
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'args' => array(
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'timeout' => 0.01,
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'blocking' => false,
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/** This filter is documented in wp-includes/class-http.php */
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'sslverify' => apply_filters( 'https_local_ssl_verify', false )
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)
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) );
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wp_remote_post( $cron_request['url'], $cron_request['args'] );
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}
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/**
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* Run scheduled callbacks or spawn cron for all scheduled events.
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*
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* @since 2.1.0
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*/
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function wp_cron() {
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// Prevent infinite loops caused by lack of wp-cron.php
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if ( strpos($_SERVER['REQUEST_URI'], '/wp-cron.php') !== false || ( defined('DISABLE_WP_CRON') && DISABLE_WP_CRON ) )
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return;
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if ( false === $crons = _get_cron_array() )
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return;
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$gmt_time = microtime( true );
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$keys = array_keys( $crons );
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if ( isset($keys[0]) && $keys[0] > $gmt_time )
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return;
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$schedules = wp_get_schedules();
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foreach ( $crons as $timestamp => $cronhooks ) {
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if ( $timestamp > $gmt_time ) break;
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foreach ( (array) $cronhooks as $hook => $args ) {
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if ( isset($schedules[$hook]['callback']) && !call_user_func( $schedules[$hook]['callback'] ) )
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continue;
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spawn_cron( $gmt_time );
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break 2;
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}
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}
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}
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/**
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* Retrieve supported and filtered Cron recurrences.
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*
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* The supported recurrences are 'hourly' and 'daily'. A plugin may add more by
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* hooking into the 'cron_schedules' filter. The filter accepts an array of
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* arrays. The outer array has a key that is the name of the schedule or for
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* example 'weekly'. The value is an array with two keys, one is 'interval' and
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* the other is 'display'.
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*
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* The 'interval' is a number in seconds of when the cron job should run. So for
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* 'hourly', the time is 3600 or 60*60. For weekly, the value would be
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* 60*60*24*7 or 604800. The value of 'interval' would then be 604800.
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*
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* The 'display' is the description. For the 'weekly' key, the 'display' would
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* be `__( 'Once Weekly' )`.
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*
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* For your plugin, you will be passed an array. you can easily add your
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* schedule by doing the following.
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*
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* // Filter parameter variable name is 'array'.
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* $array['weekly'] = array(
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* 'interval' => 604800,
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* 'display' => __( 'Once Weekly' )
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* );
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*
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*
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* @since 2.1.0
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*
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* @return array
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*/
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function wp_get_schedules() {
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$schedules = array(
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'hourly' => array( 'interval' => HOUR_IN_SECONDS, 'display' => __( 'Once Hourly' ) ),
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'twicedaily' => array( 'interval' => 12 * HOUR_IN_SECONDS, 'display' => __( 'Twice Daily' ) ),
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'daily' => array( 'interval' => DAY_IN_SECONDS, 'display' => __( 'Once Daily' ) ),
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);
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/**
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* Filter the non-default cron schedules.
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*
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* @since 2.1.0
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*
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* @param array $new_schedules An array of non-default cron schedules. Default empty.
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*/
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return array_merge( apply_filters( 'cron_schedules', array() ), $schedules );
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}
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/**
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* Retrieve Cron schedule for hook with arguments.
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*
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* @since 2.1.0
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*
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* @param string $hook Action hook to execute when cron is run.
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* @param array $args Optional. Arguments to pass to the hook's callback function.
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* @return string|false False, if no schedule. Schedule on success.
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*/
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function wp_get_schedule($hook, $args = array()) {
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$crons = _get_cron_array();
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$key = md5(serialize($args));
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if ( empty($crons) )
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return false;
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foreach ( $crons as $timestamp => $cron ) {
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if ( isset( $cron[$hook][$key] ) )
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return $cron[$hook][$key]['schedule'];
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}
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return false;
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}
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//
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// Private functions
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//
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/**
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* Retrieve cron info array option.
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*
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* @since 2.1.0
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* @access private
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*
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* @return false|array CRON info array.
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*/
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function _get_cron_array() {
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$cron = get_option('cron');
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if ( ! is_array($cron) )
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return false;
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if ( !isset($cron['version']) )
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$cron = _upgrade_cron_array($cron);
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unset($cron['version']);
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return $cron;
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}
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/**
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* Updates the CRON option with the new CRON array.
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*
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* @since 2.1.0
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* @access private
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*
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* @param array $cron Cron info array from {@link _get_cron_array()}.
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*/
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function _set_cron_array($cron) {
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$cron['version'] = 2;
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update_option( 'cron', $cron );
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}
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/**
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* Upgrade a Cron info array.
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*
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* This function upgrades the Cron info array to version 2.
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*
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* @since 2.1.0
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* @access private
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*
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* @param array $cron Cron info array from {@link _get_cron_array()}.
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* @return array An upgraded Cron info array.
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*/
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function _upgrade_cron_array($cron) {
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if ( isset($cron['version']) && 2 == $cron['version'])
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return $cron;
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$new_cron = array();
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foreach ( (array) $cron as $timestamp => $hooks) {
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foreach ( (array) $hooks as $hook => $args ) {
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$key = md5(serialize($args['args']));
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$new_cron[$timestamp][$hook][$key] = $args;
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}
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}
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$new_cron['version'] = 2;
|
|
update_option( 'cron', $new_cron );
|
|
return $new_cron;
|
|
}
|