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filter is not described

pre_unschedule_hook filter-hook . WP 5.1.0

Filter to preflight or hijack clearing all events attached to the hook.

Returning a non-null value will short-circuit the normal unscheduling process, causing the function to return the filtered value instead.

For plugins replacing wp-cron, return the number of events successfully unscheduled (zero if no events were registered with the hook) or false if unscheduling one or more events fails.


add_filter( 'pre_unschedule_hook', 'filter_function_name_7608', 10, 2 );
function filter_function_name_7608( $pre, $hook ){
	// filter...

	return $pre;
Value to return instead.
Default: null to continue unscheduling the hook
Action hook, the execution of which will be unscheduled.


Since 5.1.0 Introduced.

Where the hook is called

wp-includes/cron.php 498
$pre = apply_filters( 'pre_unschedule_hook', null, $hook );

Where in WP core the hook is used WordPress

Usage not found.