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filter is not described

pre_clear_scheduled_hook filter-hook . WP 5.1.0

Filter to preflight or hijack clearing a scheduled 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_clear_scheduled_hook', 'filter_function_name_3073', 10, 4 );
function filter_function_name_3073( $pre, $hook, $args, $wp_error ){
	// filter...

	return $pre;
Value to return instead.
Default: null to continue unscheduling the event
Action hook, the execution of which will be unscheduled.
Arguments to pass to the hook's callback function.
Whether to return a WP_Error on failure.


Since 5.1.0 Introduced.
Since 5.7.0 The $wp_error parameter was added, and a WP_Error object can now be returned.

Where the hook is called

wp-includes/cron.php 572
$pre = apply_filters( 'pre_clear_scheduled_hook', null, $hook, $args, $wp_error );

Where in WP core the hook is used WordPress

Usage not found.