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current_time( 'mysql' ) returns local site time: 2018-09-18 14:22:40
current_time( 'mysql', 1 ) returns GMT: 2018-09-18 21:22:40
current_time( 'timestamp' ) returns local site time: 2018-09-18 07:22:40current_time( 'timestamp', 1 ) returns GMT: 2018-09-18 14:22:40

TIME NOW : SYSTEM