Title: wp-includes/cron.php | Developer.WordPress.org --- # File: wp-includes/cron.php * hook[wp_next_scheduled](https://developer.wordpress.org/reference/hooks/wp_next_scheduled/) * Filters the timestamp of the next scheduled event for the given hook. * Used by [1 function](https://developer.wordpress.org/reference/hooks/wp_next_scheduled/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/wp_next_scheduled/#uses) | Source: [wp-includes/cron.php:859](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L859-L859) * function[_wp_cron()](https://developer.wordpress.org/reference/functions/_wp_cron/) * Runs scheduled callbacks or spawns cron for all scheduled events. * Used by [1 function](https://developer.wordpress.org/reference/functions/_wp_cron/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/_wp_cron/#uses) | Source: [wp-includes/cron.php:1018](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1018-L1062) * function[wp_get_ready_cron_jobs()](https://developer.wordpress.org/reference/functions/wp_get_ready_cron_jobs/) * Retrieves cron jobs ready to be run. * Used by [2 functions](https://developer.wordpress.org/reference/functions/wp_get_ready_cron_jobs/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_get_ready_cron_jobs/#uses) | Source: [wp-includes/cron.php:1185](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1185-L1216) * hook[pre_get_ready_cron_jobs](https://developer.wordpress.org/reference/hooks/pre_get_ready_cron_jobs/) * Filter to override retrieving ready cron jobs. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pre_get_ready_cron_jobs/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_get_ready_cron_jobs/#uses) | Source: [wp-includes/cron.php:1197](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1197-L1197) * hook[get_schedule](https://developer.wordpress.org/reference/hooks/get_schedule/) * Filters the schedule name for a hook. * Used by [1 function](https://developer.wordpress.org/reference/hooks/get_schedule/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/get_schedule/#uses) | Source: [wp-includes/cron.php:1172](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1172-L1172) * hook[pre_unschedule_hook](https://developer.wordpress.org/reference/hooks/pre_unschedule_hook/) * Filter to override clearing all events attached to the hook. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pre_unschedule_hook/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_unschedule_hook/#uses) | Source: [wp-includes/cron.php:673](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L673-L673) * function[wp_get_scheduled_event()](https://developer.wordpress.org/reference/functions/wp_get_scheduled_event/) * Retrieves a scheduled event. * Used by [3 functions](https://developer.wordpress.org/reference/functions/wp_get_scheduled_event/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_get_scheduled_event/#uses) | Source: [wp-includes/cron.php:751](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L751-L818) * hook[pre_get_scheduled_event](https://developer.wordpress.org/reference/hooks/pre_get_scheduled_event/) * Filter to override retrieving a scheduled event. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pre_get_scheduled_event/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_get_scheduled_event/#uses) | Source: [wp-includes/cron.php:770](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L770-L770) * hook[pre_reschedule_event](https://developer.wordpress.org/reference/hooks/pre_reschedule_event/) * Filter to override rescheduling of a recurring event. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pre_reschedule_event/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_reschedule_event/#uses) | Source: [wp-includes/cron.php:402](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L402-L402) * hook[pre_unschedule_event](https://developer.wordpress.org/reference/hooks/pre_unschedule_event/) * Filter to override unscheduling of events. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pre_unschedule_event/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_unschedule_event/#uses) | Source: [wp-includes/cron.php:493](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L493-L493) * hook[pre_clear_scheduled_hook](https://developer.wordpress.org/reference/hooks/pre_clear_scheduled_hook/) * Filter to override clearing a scheduled hook. * Used by [1 function](https://developer.wordpress.org/reference/hooks/pre_clear_scheduled_hook/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_clear_scheduled_hook/#uses) | Source: [wp-includes/cron.php:583](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L583-L583) * hook[pre_schedule_event](https://developer.wordpress.org/reference/hooks/pre_schedule_event/) * Filter to override scheduling an event. * Used by [2 functions](https://developer.wordpress.org/reference/hooks/pre_schedule_event/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/pre_schedule_event/#uses) | Source: [wp-includes/cron.php:91](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L91-L91) * function[wp_unschedule_hook()](https://developer.wordpress.org/reference/functions/wp_unschedule_hook/) * Unschedules all events attached to the hook. * Used by [1 function](https://developer.wordpress.org/reference/functions/wp_unschedule_hook/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/wp_unschedule_hook/#uses) | Source: [wp-includes/cron.php:654](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L654-L724) * hook[cron_schedules](https://developer.wordpress.org/reference/hooks/cron_schedules/) * Filters the non-default cron schedules. * Used by [1 function](https://developer.wordpress.org/reference/hooks/cron_schedules/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/cron_schedules/#uses) | Source: [wp-includes/cron.php:1139](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1139-L1139) * function[wp_get_schedule()](https://developer.wordpress.org/reference/functions/wp_get_schedule/) * Retrieves the name of the recurrence schedule for an event. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_get_schedule/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_get_schedule/#uses) | Source: [wp-includes/cron.php:1155](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1155-L1173) * function[wp_schedule_event()](https://developer.wordpress.org/reference/functions/wp_schedule_event/) * Schedules a recurring event. * Used by [10 functions](https://developer.wordpress.org/reference/functions/wp_schedule_event/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/wp_schedule_event/#uses) | Source: [wp-includes/cron.php:234](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L234-L313) * function[_get_cron_array()](https://developer.wordpress.org/reference/functions/_get_cron_array/) * Retrieves cron info array option. * Used by [9 functions](https://developer.wordpress.org/reference/functions/_get_cron_array/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/_get_cron_array/#uses) | Source: [wp-includes/cron.php:1231](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1231-L1244) * function[wp_reschedule_event()](https://developer.wordpress.org/reference/functions/wp_reschedule_event/) * Reschedules a recurring event. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_reschedule_event/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/wp_reschedule_event/#uses) | Source: [wp-includes/cron.php:340](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L340-L440) * function[_set_cron_array()](https://developer.wordpress.org/reference/functions/_set_cron_array/) * Updates the cron option with the new cron array. * Used by [4 functions](https://developer.wordpress.org/reference/functions/_set_cron_array/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/_set_cron_array/#uses) | Source: [wp-includes/cron.php:1259](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1259-L1276) * function[wp_unschedule_event()](https://developer.wordpress.org/reference/functions/wp_unschedule_event/) * Unschedules a previously scheduled event. * Used by [1 function](https://developer.wordpress.org/reference/functions/wp_unschedule_event/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/wp_unschedule_event/#uses) | Source: [wp-includes/cron.php:462](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L462-L524) * function[_upgrade_cron_array()](https://developer.wordpress.org/reference/functions/_upgrade_cron_array/) * Upgrades a cron info array. * Used by [1 function](https://developer.wordpress.org/reference/functions/_upgrade_cron_array/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/_upgrade_cron_array/#uses) | Source: [wp-includes/cron.php:1289](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1289-L1309) * function[wp_clear_scheduled_hook()](https://developer.wordpress.org/reference/functions/wp_clear_scheduled_hook/) * Unschedules all events attached to the hook with the specified arguments. * Used by [5 functions](https://developer.wordpress.org/reference/functions/wp_clear_scheduled_hook/#used-by) | Uses [7 functions](https://developer.wordpress.org/reference/functions/wp_clear_scheduled_hook/#uses) | Source: [wp-includes/cron.php:549](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L549-L633) * function[wp_next_scheduled()](https://developer.wordpress.org/reference/functions/wp_next_scheduled/) * Retrieves the timestamp of the next scheduled event for the given hook. * Used by [12 functions](https://developer.wordpress.org/reference/functions/wp_next_scheduled/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_next_scheduled/#uses) | Source: [wp-includes/cron.php:832](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L832-L860) * function[spawn_cron()](https://developer.wordpress.org/reference/functions/spawn_cron/) * Sends a request to run cron through HTTP request that doesn’t halt page loading. * Used by [1 function](https://developer.wordpress.org/reference/functions/spawn_cron/#used-by) | Uses [11 functions](https://developer.wordpress.org/reference/functions/spawn_cron/#uses) | Source: [wp-includes/cron.php:871](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L871-L972) * hook[cron_request](https://developer.wordpress.org/reference/hooks/cron_request/) * Filters the cron request arguments. * Used by [1 function](https://developer.wordpress.org/reference/hooks/cron_request/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/cron_request/#uses) | Source: [wp-includes/cron.php:954](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L954-L967) * function[wp_cron()](https://developer.wordpress.org/reference/functions/wp_cron/) * Registers _wp_cron() to run on the {@see ‘shutdown’} action. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_cron/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/wp_cron/#uses) | Source: [wp-includes/cron.php:990](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L990-L1002) * function[wp_get_schedules()](https://developer.wordpress.org/reference/functions/wp_get_schedules/) * Retrieves supported event recurrence schedules. * Used by [4 functions](https://developer.wordpress.org/reference/functions/wp_get_schedules/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/wp_get_schedules/#uses) | Source: [wp-includes/cron.php:1103](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L1103-L1140) * function[wp_schedule_single_event()](https://developer.wordpress.org/reference/functions/wp_schedule_single_event/) * Schedules an event to run only once. * Used by [10 functions](https://developer.wordpress.org/reference/functions/wp_schedule_single_event/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/wp_schedule_single_event/#uses) | Source: [wp-includes/cron.php:39](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L39-L200) * hook[schedule_event](https://developer.wordpress.org/reference/hooks/schedule_event/) * Modify an event before it is scheduled. * Used by [2 functions](https://developer.wordpress.org/reference/hooks/schedule_event/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/schedule_event/#uses) | Source: [wp-includes/cron.php:179](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/cron.php#L179-L179)