wp_schedule_single_event( int $timestamp, string $hook, array $args = array() )
安排事件只运行一次。
Schedules an event to run only once.
目录锚点:#说明#参数#源码#笔记
计划在指定时间由WordPress触发的钩子。当有人访问你的WordPress站点时,如果已经过了预定的时间,该操作将被触发。请注意,除非为每个计划的事件传递唯一的$args值,否则将忽略将事件安排在具有相同操作钩子的现有事件10分钟内发生。使用wp_next_scheduled()可防止重复事件。使用wp_schedule_event()来计划定期事件。
参数 | 类型 | 说明 |
$timestamp |
(int) |
下次运行事件的时间戳(UTC)。 |
$hook |
(string) |
要在事件运行时执行的操作钩子。 |
$args |
(array) |
数组,包含要传递给钩子的回调函数的每个独立参数。 |
/**
* Schedules a hook to run only once.
*
* Schedules a hook which will be executed once by the WordPress actions core at
* a time which you specify. The action will fire off when someone visits your
* WordPress site, if the schedule time has passed.
*
* @since 2.1.0
* @link https://codex.wordpress.org/Function_Reference/wp_schedule_single_event
*
* @param int $timestamp Timestamp for when to run the event.
* @param string $hook Action hook to execute when cron is run.
* @param array $args Optional. Arguments to pass to the hook's callback function.
* @return void|false
*/
function wp_schedule_single_event( $timestamp, $hook, $args = array()) {
// don't schedule a duplicate if there's already an identical event due within 10 minutes of it
$next = wp_next_scheduled($hook, $args);
if ( $next && abs( $next - $timestamp ) <= 10="" *="" minute_in_seconds="" )="" {="" return;="" }="" $crons="_get_cron_array();" $event="(object)" array(="" 'hook'=""> $hook, 'timestamp' => $timestamp, 'schedule' => false, 'args' => $args );
/**
* Filter a single event before it is scheduled.
*
* @since 3.1.0
*
* @param object $event An object containing an event's data.
*/
$event = apply_filters( 'schedule_event', $event );
// A plugin disallowed this event
if ( ! $event )
return false;
$key = md5(serialize($event->args));
$crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args );
uksort( $crons, "strnatcasecmp" );
_set_cron_array( $crons );
}
更新版本 |
源码位置 |
使用 |
被使用 |
5.1.0 |
wp-includes/cron.php |
13 |
19 |
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