current_time( 'mysql' ) returns local site time: 2021-10-20 11:48:16
current_time( 'mysql', 1 ) returns GMT: 2021-10-20 15:48:16
current_time( 'timestamp' ) returns local site time: 2021-10-20 11:48:16current_time( 'timestamp', 1 ) returns GMT: 2021-10-20 15:48:16
