Wordpress: corn job

gistfile1.txt

//You probably know that WordPress can schedule events. 
// In this recipe, I’ll show you how you create an event that will be executed once hourly, or daily, etc.
if (!wp_next_scheduled('my_task_hook')) {
	wp_schedule_event( time(), 'hourly', 'my_task_hook' );
}

add_action( 'my_task_hook', 'my_task_function' ); 

function my_task_function() {
	wp_mail('[email protected]', 'Automatic email', 'Hello, this is an automatically scheduled email from WordPress.');
}