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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 |
|---|---|
| 316 | * |
| 317 | * @return array |
| 318 | */ |
| 319 | function wp_get_schedules() { |
| 320 | $schedules = array( |
| 321 | 'hourly' => array( 'interval' => HOUR_IN_SECONDS, 'display' => __( 'Once Hourly' ) ), |
| 322 | 'twicedaily' => array( 'interval' => 12 * HOUR_IN_SECONDS, 'display' => __( 'Twice Daily' ) ), |
| 323 | 'daily' => array( 'interval' => DAY_IN_SECONDS, 'display' => __( 'Once Daily' ) ), |
| 324 | ); |
| 325 | return array_merge( apply_filters( 'cron_schedules', array() ), $schedules ); |
| 326 | } |
| 327 | |
| 328 | /** |
| 329 | * Retrieve Cron schedule for hook with arguments. |
| 330 | * |
| 331 | * @since 2.1.0 |
| 332 | * |
| 333 | * @param string $hook Action hook to execute when cron is run. |
| 334 | * @param array $args Optional. Arguments to pass to the hook's callback function. |