Wordpress cron jon每6小时一次

https://developer.wordpress.org/reference/hooks/cron_schedules/

允许您设置自定义计划。

https://wordpress.stackexchange.com/questions/179694/wp-schedule-event-every-day-at-specific-time

function myprefix_custom_cron_schedule( $schedules ) {
    $schedules['every_six_hours'] = array(
        'interval' => 21600, // Every 6 hours
        'display'  => __( 'Every 6 hours' ),
    );
    return $schedules;
}
add_filter( 'cron_schedules', 'myprefix_custom_cron_schedule' );