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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 |
|---|---|
| 297 | * |
| 298 | * @return array |
| 299 | */ |
| 300 | function wp_get_schedules() { |
| 301 | $schedules = array( |
| 302 | 'hourly' => array( 'interval' => 3600, 'display' => __('Once Hourly') ), |
| 303 | 'twicedaily' => array( 'interval' => 43200, 'display' => __('Twice Daily') ), |
| 304 | 'daily' => array( 'interval' => 86400, 'display' => __('Once Daily') ), |
| 305 | ); |
| 306 | return array_merge( apply_filters( 'cron_schedules', array() ), $schedules ); |
| 307 | } |
| 308 | |
| 309 | /** |
| 310 | * Retrieve Cron schedule for hook with arguments. |
| 311 | * |
| 312 | * @since 2.1.0 |
| 313 | * |
| 314 | * @param string $hook Action hook to execute when cron is run. |
| 315 | * @param array $args Optional. Arguments to pass to the hook's callback function. |