current_time( 'mysql' ) returns local site time: 2020-03-30 18:03:45
current_time( 'mysql', 1 ) returns GMT: 2020-03-30 22:03:45
current_time( 'timestamp' ) returns local site time: 2020-03-30 18:03:45current_time( 'timestamp', 1 ) returns GMT: 2020-03-30 22:03:45
