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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.
| Line | Code |
|---|---|
| 266 | * |
| 267 | * @return array |
| 268 | */ |
| 269 | function wp_get_schedules() { |
| 270 | $schedules = array( |
| 271 | 'hourly' => array( 'interval' => 3600, 'display' => __('Once Hourly') ), |
| 272 | 'twicedaily' => array( 'interval' => 43200, 'display' => __('Twice Daily') ), |
| 273 | 'daily' => array( 'interval' => 86400, 'display' => __('Once Daily') ), |
| 274 | ); |
| 275 | return array_merge( apply_filters( 'cron_schedules', array() ), $schedules ); |
| 276 | } |
| 277 | |
| 278 | /** |
| 279 | * Retrieve Cron schedule for hook with arguments. |
| 280 | * |
| 281 | * @since 2.1.0 |
| 282 | * |
| 283 | * @param callback $hook Function or method to call, when cron is run. |
| 284 | * @param array $args Optional. Arguments to pass to the hook function. |