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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 2 times in this file.
Line | Code |
---|---|
28 | $crons = _get_cron_array(); |
29 | $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => false, 'args' => $args ); |
30 | /** |
31 | * Filter a single event before it is scheduled. |
32 | * |
33 | * @since 3.1.0 |
34 | * |
35 | * @param object $event An object containing an event's data. |
36 | */ |
37 | $event = apply_filters( 'schedule_event', $event ); |
38 |
|
39 | // A plugin disallowed this event |
40 | if ( ! $event ) |
41 | return false; |
42 |
|
43 | $key = md5(serialize($event->args)); |
44 |
|
45 | $crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args ); |
46 | uksort( $crons, "strnatcasecmp" ); |
Line | Code |
70 | function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array()) { |
71 | $crons = _get_cron_array(); |
72 | $schedules = wp_get_schedules(); |
73 |
|
74 | if ( !isset( $schedules[$recurrence] ) ) |
75 | return false; |
76 |
|
77 | $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => $recurrence, 'args' => $args, 'interval' => $schedules[$recurrence]['interval'] ); |
78 | /** This filter is documented in wp-includes/cron.php */ |
79 | $event = apply_filters( 'schedule_event', $event ); |
80 |
|
81 | // A plugin disallowed this event |
82 | if ( ! $event ) |
83 | return false; |
84 |
|
85 | $key = md5(serialize($event->args)); |
86 |
|
87 | $crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args, 'interval' => $event->interval ); |
88 | uksort( $crons, "strnatcasecmp" ); |