current_time( 'mysql' ) returns local site time: 2020-07-06 20:27:14
current_time( 'mysql', 1 ) returns GMT: 2020-07-07 00:27:14
current_time( 'timestamp' ) returns local site time: 2020-07-06 20:27:14current_time( 'timestamp', 1 ) returns GMT: 2020-07-07 00:27:14
