PHP verifies the daily format

PHP verification daily format _ email verification _ mobile phone verification _ identity authentication _ web site verification _ time verification

 \? \/\ '\ "] *) |. {0, 5}) $ | \ s/"; if (! Preg_match ($ chars, $ user_safe) {return true; // return true if no special character is found} else {return false ;}} /*** check whether it is a valid time format ** @ access public * @ param string $ time format: 2011-11-16 15:54:13 * @ return void */function is_time ($ time) {$ pattern = '/[\ d] {4}-[\ d] {1, 2}-[\ d] {1, 2} \ s [\ d] {1, 2 }: [\ d] {1, 2}: [\ d] {1, 2}/'; return preg_match ($ pattern, $ time) ;}?>