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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 |
---|---|
30 | $crons = _get_cron_array(); |
31 | $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => false, 'args' => $args ); |
32 | /** |
33 | * Filter a single event before it is scheduled. |
34 | * |
35 | * @since 3.1.0 |
36 | * |
37 | * @param object $event An object containing an event's data. |
38 | */ |
39 | $event = apply_filters( 'schedule_event', $event ); |
40 |
|
41 | // A plugin disallowed this event |
42 | if ( ! $event ) |
43 | return false; |
44 |
|
45 | $key = md5(serialize($event->args)); |
46 |
|
47 | $crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args ); |
48 | uksort( $crons, "strnatcasecmp" ); |
Line | Code |
72 | function wp_schedule_event( $timestamp, $recurrence, $hook, $args = array()) { |
73 | $crons = _get_cron_array(); |
74 | $schedules = wp_get_schedules(); |
75 |
|
76 | if ( !isset( $schedules[$recurrence] ) ) |
77 | return false; |
78 |
|
79 | $event = (object) array( 'hook' => $hook, 'timestamp' => $timestamp, 'schedule' => $recurrence, 'args' => $args, 'interval' => $schedules[$recurrence]['interval'] ); |
80 | /** This filter is documented in wp-includes/cron.php */ |
81 | $event = apply_filters( 'schedule_event', $event ); |
82 |
|
83 | // A plugin disallowed this event |
84 | if ( ! $event ) |
85 | return false; |
86 |
|
87 | $key = md5(serialize($event->args)); |
88 |
|
89 | $crons[$event->timestamp][$event->hook][$key] = array( 'schedule' => $event->schedule, 'args' => $event->args, 'interval' => $event->interval ); |
90 | uksort( $crons, "strnatcasecmp" ); |