Test cron wordpress

hfn_crontask.php

<?php
/*
Plugin Name: HFN test schedule
Version: 0.0.1
Plugin URI: http://hotfirenet.com/
Description: Plugin qui test le cron
Author: Johan VIVIEN
Author URI: http://hotfirenet.com
*/
defined( 'ABSPATH' ) or die( 'Cheatin&#8217; uh?' );

if ( ! wp_next_scheduled( 'hfn_crontask_hook' ) ) {
  wp_schedule_event( time(), 'hourly', 'hfn_crontask_hook' );
}

add_action( 'hfn_crontask_hook', function () {

	$myTime = the_time( get_option( 'date_format' ) );
	update_option( 'hfn_date_last_schedule', $myTime );

  wp_mail( get_option('admin_email'), 'Automatic email', 'Automatic scheduled email from WordPress.');

});