函数文档

wp_reschedule_event()

💡 云策文档标注

概述

wp_reschedule_event() 函数用于重新安排一个已存在的重复事件的执行时间,主要供内部使用。它基于事件的上次运行时间戳和指定的重复频率,计算并设置下一次运行时间。

关键要点

  • 函数主要用于内部处理,开发者通常使用 wp_schedule_event() 来修改未来事件的调度。
  • 参数包括:$timestamp(事件上次调度的 Unix 时间戳,UTC)、$recurrence(重复频率,值参考 wp_get_schedules())、$hook(事件触发时执行的动作钩子)、$args(传递给回调函数的参数数组,可选)、$wp_error(失败时是否返回 WP_Error,可选)。
  • 返回值:成功时返回 true,失败时返回 false 或 WP_Error(取决于 $wp_error 参数)。
  • 函数内部通过 'pre_reschedule_event' 过滤器允许插件覆盖重调度过程,并处理时间戳计算以确保事件在正确时间运行。

代码示例

function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array(), $wp_error = false ) {
    // 确保时间戳是正整数
    if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) {
        if ( $wp_error ) {
            return new WP_Error( 'invalid_timestamp', __( 'Event timestamp must be a valid Unix timestamp.' ) );
        }
        return false;
    }
    // 其他代码...
}

注意事项

  • 时间戳应为 UTC 时间,且必须是正整数,否则函数可能返回错误。
  • 重复频率需通过 wp_get_schedules() 获取有效值,否则可能导致调度失败。
  • 使用 'pre_reschedule_event' 过滤器时,插件可以返回 true、false 或 WP_Error 来中断正常重调度流程。

📄 原文内容

Reschedules a recurring event.

Description

Mainly for internal use, this takes the Unix timestamp (UTC) of a previously run recurring event and reschedules it for its next run.

To change upcoming scheduled events, use wp_schedule_event() to change the recurrence frequency.

Parameters

$timestampintrequired
Unix timestamp (UTC) for when the event was scheduled.
$recurrencestringrequired
How often the event should subsequently recur.
See wp_get_schedules() for accepted values.
$hookstringrequired
Action hook to execute when the event is run.
$argsarrayoptional
Array containing arguments to pass to the hook’s callback function. Each value in the array is passed to the callback as an individual parameter.
The array keys are ignored.

Default:array()

$wp_errorbooloptional
Whether to return a WP_Error on failure.

Default:false

Return

bool|WP_Error True if event successfully rescheduled. False or WP_Error on failure.

Source

function wp_reschedule_event( $timestamp, $recurrence, $hook, $args = array(), $wp_error = false ) {
	// Make sure timestamp is a positive integer.
	if ( ! is_numeric( $timestamp ) || $timestamp <= 0 ) {
		if ( $wp_error ) {
			return new WP_Error(
				'invalid_timestamp',
				__( 'Event timestamp must be a valid Unix timestamp.' )
			);
		}

		return false;
	}

	$schedules = wp_get_schedules();
	$interval  = 0;

	// First we try to get the interval from the schedule.
	if ( isset( $schedules[ $recurrence ] ) ) {
		$interval = $schedules[ $recurrence ]['interval'];
	}

	// Now we try to get it from the saved interval in case the schedule disappears.
	if ( 0 === $interval ) {
		$scheduled_event = wp_get_scheduled_event( $hook, $args, $timestamp );

		if ( $scheduled_event && isset( $scheduled_event->interval ) ) {
			$interval = $scheduled_event->interval;
		}
	}

	$event = (object) array(
		'hook'      => $hook,
		'timestamp' => $timestamp,
		'schedule'  => $recurrence,
		'args'      => $args,
		'interval'  => $interval,
	);

	/**
	 * Filter to override rescheduling of a recurring event.
	 *
	 * Returning a non-null value will short-circuit the normal rescheduling
	 * process, causing the function to return the filtered value instead.
	 *
	 * For plugins replacing wp-cron, return true if the event was successfully
	 * rescheduled, false or a WP_Error if not.
	 *
	 * @since 5.1.0
	 * @since 5.7.0 The `$wp_error` parameter was added, and a `WP_Error` object can now be returned.
	 *
	 * @param null|bool|WP_Error $pre      Value to return instead. Default null to continue adding the event.
	 * @param object             $event    {
	 *     An object containing an event's data.
	 *
	 *     @type string $hook      Action hook to execute when the event is run.
	 *     @type int    $timestamp Unix timestamp (UTC) for when to next run the event.
	 *     @type string $schedule  How often the event should subsequently recur.
	 *     @type array  $args      Array containing each separate argument to pass to the hook's callback function.
	 *     @type int    $interval  The interval time in seconds for the schedule.
	 * }
	 * @param bool               $wp_error Whether to return a WP_Error on failure.
	 */
	$pre = apply_filters( 'pre_reschedule_event', null, $event, $wp_error );

	if ( null !== $pre ) {
		if ( $wp_error && false === $pre ) {
			return new WP_Error(
				'pre_reschedule_event_false',
				__( 'A plugin prevented the event from being rescheduled.' )
			);
		}

		if ( ! $wp_error && is_wp_error( $pre ) ) {
			return false;
		}

		return $pre;
	}

	// Now we assume something is wrong and fail to schedule.
	if ( 0 === $interval ) {
		if ( $wp_error ) {
			return new WP_Error(
				'invalid_schedule',
				__( 'Event schedule does not exist.' )
			);
		}

		return false;
	}

	$now = time();

	if ( $timestamp >= $now ) {
		$timestamp = $now + $interval;
	} else {
		$timestamp = $now + ( $interval - ( ( $now - $timestamp ) % $interval ) );
	}

	return wp_schedule_event( $timestamp, $recurrence, $hook, $args, $wp_error );
}

Hooks

apply_filters( ‘pre_reschedule_event’, null|bool|WP_Error $pre, object $event, bool $wp_error )

Filter to override rescheduling of a recurring event.

Changelog

Version Description
5.7.0 The $wp_error parameter was added.
5.1.0 Return value modified to boolean indicating success or failure, ‘pre_reschedule_event’ filter added to short-circuit the function.
2.1.0 Introduced.