current_time( 'mysql' ) returns local site time: 2021-04-13 18:06:33
current_time( 'mysql', 1 ) returns GMT: 2021-04-13 22:06:33
current_time( 'timestamp' ) returns local site time: 2021-04-13 18:06:33current_time( 'timestamp', 1 ) returns GMT: 2021-04-13 22:06:33
