current_time( 'mysql' ) returns local site time: 2021-10-20 17:45:36
current_time( 'mysql', 1 ) returns GMT: 2021-10-20 15:45:36
current_time( 'timestamp' ) returns local site time: 2021-10-20 17:45:36current_time( 'timestamp', 1 ) returns GMT: 2021-10-20 15:45:36
