599 lines
18 KiB
PHP
599 lines
18 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 an event to run only once.
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*
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* Schedules a hook which will be triggered by WordPress at the specified time.
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* The action will trigger when someone visits your WordPress site if the scheduled
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* time has passed.
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*
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* Note that scheduling an event to occur within 10 minutes of an existing event
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* with the same action hook will be ignored unless you pass unique `$args` values
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* for each scheduled event.
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*
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* Use wp_next_scheduled() to prevent duplicate events.
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*
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* Use wp_schedule_event() to schedule a recurring event.
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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 Unix timestamp (UTC) for when to next run the event.
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* @param string $hook Action hook to execute when the event is run.
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* @param array $args Optional. Array containing each separate argument to pass to the hook's callback function.
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* @return false|void False if the event did not get 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(
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'hook' => $hook,
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'timestamp' => $timestamp,
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'schedule' => false,
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'args' => $args,
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);
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/**
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* Filters 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 stdClass $event {
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* An object containing an event's data.
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*
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* @type string $hook Action hook to execute when the event is run.
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* @type int $timestamp Unix timestamp (UTC) for when to next run the event.
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* @type string|false $schedule How often the event should subsequently recur.
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* @type array $args Array containing each separate argument to pass to the hook's callback function.
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* @type int $interval The interval time in seconds for the schedule. Only present for recurring events.
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* }
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*/
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$event = apply_filters( 'schedule_event', $event );
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// A plugin disallowed this event
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if ( ! $event ) {
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return false;
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}
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$key = md5( serialize( $event->args ) );
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$crons[ $event->timestamp ][ $event->hook ][ $key ] = array(
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'schedule' => $event->schedule,
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'args' => $event->args,
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);
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uksort( $crons, 'strnatcasecmp' );
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_set_cron_array( $crons );
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}
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/**
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* Schedules a recurring event.
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*
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* Schedules a hook which will be triggered by WordPress at the specified interval.
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* The action will trigger when someone visits your WordPress site if the scheduled
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* time has passed.
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*
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* Valid values for the recurrence are 'hourly', 'daily', and 'twicedaily'. These can
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* be extended using the {@see 'cron_schedules'} filter in wp_get_schedules().
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*
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* Note that scheduling an event to occur within 10 minutes of an existing event
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* with the same action hook will be ignored unless you pass unique `$args` values
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* for each scheduled event.
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*
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* Use wp_next_scheduled() to prevent duplicate events.
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*
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* Use wp_schedule_single_event() to schedule a non-recurring event.
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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_event
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*
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* @param int $timestamp Unix timestamp (UTC) for when to next run the event.
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* @param string $recurrence How often the event should subsequently recur. See wp_get_schedules() for accepted values.
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* @param string $hook Action hook to execute when the event is run.
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* @param array $args Optional. Array containing each separate argument to pass to the hook's callback function.
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* @return false|void False if the event did not get 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[ $recurrence ] ) ) {
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return false;
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}
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$event = (object) array(
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'hook' => $hook,
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'timestamp' => $timestamp,
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'schedule' => $recurrence,
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'args' => $args,
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'interval' => $schedules[ $recurrence ]['interval'],
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);
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/** This filter is documented in wp-includes/cron.php */
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$event = apply_filters( 'schedule_event', $event );
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// A plugin disallowed this event
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if ( ! $event ) {
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return false;
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}
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$key = md5( serialize( $event->args ) );
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$crons[ $event->timestamp ][ $event->hook ][ $key ] = array(
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'schedule' => $event->schedule,
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'args' => $event->args,
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'interval' => $event->interval,
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);
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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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* Reschedules 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 Unix timestamp (UTC) for when to next run the event.
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* @param string $recurrence How often the event should subsequently recur. See wp_get_schedules() for accepted values.
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* @param string $hook Action hook to execute when the event is run.
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* @param array $args Optional. Array containing each separate argument to pass to the hook's callback function.
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* @return false|void False if the event did not get rescheduled.
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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 event.
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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 Unix timestamp (UTC) of the event.
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* @param string $hook Action hook of the event.
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* @param array $args Optional. Array containing each separate argument to pass to the hook's callback function.
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* Although not passed to a callback, these arguments are used to uniquely identify the
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* event, so they should be the same as those used when originally scheduling the event.
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* @return false|void False if the event did not get unscheduled.
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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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}
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if ( empty( $crons[ $timestamp ] ) ) {
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unset( $crons[ $timestamp ] );
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}
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_set_cron_array( $crons );
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}
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/**
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* Unschedules all events attached to the hook with the specified 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, the execution of which will be unscheduled.
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* @param array $args Optional. Arguments that were to be passed 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( $args ) ) {
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_deprecated_argument( __FUNCTION__, '3.0.0', __( 'This argument has changed to an array to match the behavior of the other cron functions.' ) );
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$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( $crons ) ) {
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return;
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}
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$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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* Unschedules all events attached to the hook.
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*
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* Can be useful for plugins when deactivating to clean up the cron queue.
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*
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* @since 4.9.0
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*
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* @param string $hook Action hook, the execution of which will be unscheduled.
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*/
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function wp_unschedule_hook( $hook ) {
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$crons = _get_cron_array();
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foreach ( $crons as $timestamp => $args ) {
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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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}
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}
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_set_cron_array( $crons );
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}
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/**
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* Retrieve the next timestamp for an 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 of the event.
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* @param array $args Optional. Array containing each separate argument to pass to the hook's callback function.
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* Although not passed to a callback, these arguments are used to uniquely identify the
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* event, so they should be the same as those used when originally scheduling the event.
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* @return false|int The Unix timestamp of the next time the event will occur. False if the event doesn't exist.
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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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}
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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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}
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return false;
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}
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/**
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* Sends a 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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* @param int $gmt_time Optional. Unix timestamp (UTC). Default 0 (current time is used).
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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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}
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if ( defined( 'DOING_CRON' ) || isset( $_GET['doing_wp_cron'] ) ) {
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return;
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}
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/*
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* Get the cron lock, which is a Unix timestamp of when the last cron was spawned
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* and has not finished running.
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*
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* Multiple processes on multiple web servers can run this code concurrently,
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* this lock attempts to make spawning as atomic as possible.
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*/
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$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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}
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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 > $gmt_time ) {
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return;
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}
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//sanity check
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$crons = _get_cron_array();
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if ( ! is_array( $crons ) ) {
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return;
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}
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$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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}
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if ( defined( 'ALTERNATE_WP_CRON' ) && ALTERNATE_WP_CRON ) {
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if ( 'GET' !== $_SERVER['REQUEST_METHOD'] || defined( 'DOING_AJAX' ) || defined( 'XMLRPC_REQUEST' ) ) {
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return;
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}
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$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( $_SERVER['REQUEST_URI'] ) ) );
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echo ' ';
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// flush any buffers and send the headers
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while ( @ob_end_flush() ) {
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}
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flush();
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WP_DEBUG ? include_once( ABSPATH . 'wp-cron.php' ) : @include_once( ABSPATH . 'wp-cron.php' );
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return;
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}
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// Set the cron lock with the current unix timestamp, when the cron is being spawned.
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$doing_wp_cron = sprintf( '%.22F', $gmt_time );
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set_transient( 'doing_cron', $doing_wp_cron );
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/**
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* Filters the cron request arguments.
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*
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* @since 3.5.0
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* @since 4.5.0 The `$doing_wp_cron` parameter was added.
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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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* @param string $doing_wp_cron The unix timestamp of the cron lock.
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*/
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$cron_request = apply_filters(
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'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-wp-http-streams.php */
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'sslverify' => apply_filters( 'https_local_ssl_verify', false ),
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),
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), $doing_wp_cron
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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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}
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if ( false === $crons = _get_cron_array() ) {
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return;
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}
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$gmt_time = microtime( true );
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$keys = array_keys( $crons );
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if ( isset( $keys[0] ) && $keys[0] > $gmt_time ) {
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return;
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}
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$schedules = wp_get_schedules();
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foreach ( $crons as $timestamp => $cronhooks ) {
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if ( $timestamp > $gmt_time ) {
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break;
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}
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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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}
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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 event recurrence schedules.
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*
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* The default supported recurrences are 'hourly', 'twicedaily', and 'daily'. A plugin may
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* add more by hooking into the {@see 'cron_schedules'} filter. The filter accepts an array
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* of 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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* $array['weekly'] = array(
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* 'interval' => 604800,
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* 'display' => __( 'Once Weekly' )
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* );
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*
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* @since 2.1.0
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*
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* @return array
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*/
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function wp_get_schedules() {
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$schedules = array(
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'hourly' => array(
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'interval' => HOUR_IN_SECONDS,
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'display' => __( 'Once Hourly' ),
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),
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'twicedaily' => array(
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'interval' => 12 * HOUR_IN_SECONDS,
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'display' => __( 'Twice Daily' ),
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),
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'daily' => array(
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'interval' => DAY_IN_SECONDS,
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'display' => __( 'Once Daily' ),
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),
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);
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/**
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* Filters the non-default cron schedules.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param array $new_schedules An array of non-default cron schedules. Default empty.
|
|
*/
|
|
return array_merge( apply_filters( 'cron_schedules', array() ), $schedules );
|
|
}
|
|
|
|
/**
|
|
* Retrieve the recurrence schedule for an event.
|
|
*
|
|
* @see wp_get_schedules() for available schedules.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param string $hook Action hook to identify the event.
|
|
* @param array $args Optional. Arguments passed to the event's callback function.
|
|
* @return string|false False, if no schedule. Schedule name on success.
|
|
*/
|
|
function wp_get_schedule( $hook, $args = array() ) {
|
|
$crons = _get_cron_array();
|
|
$key = md5( serialize( $args ) );
|
|
if ( empty( $crons ) ) {
|
|
return false;
|
|
}
|
|
foreach ( $crons as $timestamp => $cron ) {
|
|
if ( isset( $cron[ $hook ][ $key ] ) ) {
|
|
return $cron[ $hook ][ $key ]['schedule'];
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Private functions
|
|
//
|
|
|
|
/**
|
|
* Retrieve cron info array option.
|
|
*
|
|
* @since 2.1.0
|
|
* @access private
|
|
*
|
|
* @return false|array CRON info array.
|
|
*/
|
|
function _get_cron_array() {
|
|
$cron = get_option( 'cron' );
|
|
if ( ! is_array( $cron ) ) {
|
|
return false;
|
|
}
|
|
|
|
if ( ! isset( $cron['version'] ) ) {
|
|
$cron = _upgrade_cron_array( $cron );
|
|
}
|
|
|
|
unset( $cron['version'] );
|
|
|
|
return $cron;
|
|
}
|
|
|
|
/**
|
|
* Updates the CRON option with the new CRON array.
|
|
*
|
|
* @since 2.1.0
|
|
* @access private
|
|
*
|
|
* @param array $cron Cron info array from _get_cron_array().
|
|
*/
|
|
function _set_cron_array( $cron ) {
|
|
$cron['version'] = 2;
|
|
update_option( 'cron', $cron );
|
|
}
|
|
|
|
/**
|
|
* Upgrade a Cron info array.
|
|
*
|
|
* This function upgrades the Cron info array to version 2.
|
|
*
|
|
* @since 2.1.0
|
|
* @access private
|
|
*
|
|
* @param array $cron Cron info array from _get_cron_array().
|
|
* @return array An upgraded Cron info array.
|
|
*/
|
|
function _upgrade_cron_array( $cron ) {
|
|
if ( isset( $cron['version'] ) && 2 == $cron['version'] ) {
|
|
return $cron;
|
|
}
|
|
|
|
$new_cron = array();
|
|
|
|
foreach ( (array) $cron as $timestamp => $hooks ) {
|
|
foreach ( (array) $hooks as $hook => $args ) {
|
|
$key = md5( serialize( $args['args'] ) );
|
|
$new_cron[ $timestamp ][ $hook ][ $key ] = $args;
|
|
}
|
|
}
|
|
|
|
$new_cron['version'] = 2;
|
|
update_option( 'cron', $new_cron );
|
|
return $new_cron;
|
|
}
|