pre_unschedule_hook
Filter HookDescription
Filter to override 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). If unscheduling one or more events fails then return either a WP_Error object or false depending on the value of the `$wp_error` parameter.Hook Information
| File Location | 
                                wp-includes/cron.php
                                
                                    View on GitHub
                                
                             | 
                        
| Hook Type | Filter | 
| Line Number | 673 | 
                        
Hook Parameters
| Type | Name | Description | 
|---|---|---|
                                    null|int|false|WP_Error
                                 | 
                                
                                    $pre
                                 | 
                                Value to return instead. Default null to continue unscheduling the hook. | 
                                    string
                                 | 
                                
                                    $hook
                                 | 
                                Action hook, the execution of which will be unscheduled. | 
                                    bool
                                 | 
                                
                                    $wp_error
                                 | 
                                Whether to return a WP_Error on failure. | 
Usage Examples
                        Basic Usage
                    
                    <?php
// Hook into pre_unschedule_hook
add_filter('pre_unschedule_hook', 'my_custom_filter', 10, 3);
function my_custom_filter($pre, $hook, $wp_error) {
    // Your custom filtering logic here
    return $pre;
}
                        
                    Source Code Context
                        wp-includes/cron.php:673
                        - How this hook is used in WordPress core
                    
                    <?php
 668  	 *
 669  	 * @param null|int|false|WP_Error $pre      Value to return instead. Default null to continue unscheduling the hook.
 670  	 * @param string                  $hook     Action hook, the execution of which will be unscheduled.
 671  	 * @param bool                    $wp_error Whether to return a WP_Error on failure.
 672  	 */
 673  	$pre = apply_filters( 'pre_unschedule_hook', null, $hook, $wp_error );
 674  
 675  	if ( null !== $pre ) {
 676  		if ( $wp_error && false === $pre ) {
 677  			return new WP_Error(
 678  				'pre_unschedule_hook_false',
                    PHP Documentation
<?php
/**
	 * Filter to override clearing all events attached to the hook.
	 *
	 * Returning a non-null value will short-circuit the normal unscheduling
	 * process, causing the function to return the filtered value instead.
	 *
	 * For plugins replacing wp-cron, return the number of events successfully
	 * unscheduled (zero if no events were registered with the hook). If unscheduling
	 * one or more events fails then return either a WP_Error object or false depending
	 * on the value of the `$wp_error` parameter.
	 *
	 * @since 5.1.0
	 * @since 5.7.0 The `$wp_error` parameter was added, and a `WP_Error` object can now be returned.
	 *
	 * @param null|int|false|WP_Error $pre      Value to return instead. Default null to continue unscheduling the hook.
	 * @param string                  $hook     Action hook, the execution of which will be unscheduled.
	 * @param bool                    $wp_error Whether to return a WP_Error on failure.
	 */
                
            
                        Quick Info
                    
                    - Hook Type: Filter
 - Parameters: 3
 - File: wp-includes/cron.php
 
                        Related Hooks
                    
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