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apply_filters( 'pre_unschedule_event', null|bool $pre, int $timestamp, string $hook, array $args )

Filter to preflight or hijack unscheduling of events.

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 true if the event was successfully unscheduled, false if not.

$pre: (null|bool) Value to return instead. Default null to continue unscheduling the event.
$timestamp: (int) Timestamp for when to run the event.
$hook: (string) Action hook, the execution of which will be unscheduled.
$args: (array) Arguments to pass to the hook's callback function.

Used By	Description
wp-includes/cron.php: wp_unschedule_event()	Unschedule a previously scheduled event.

Version	Description
5.1.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/pre_unschedule_event