Check whether the date is valid

Check whether the date is valid

Check whether the date is valid Function check_date ($ date) {// check whether the date is valid $ DateArr = explode ("-", $ date ); If (is_numeric ($ dateArr [0]) & is_numeric ($ dateArr [1]) & is_numeric ($ dateArr [2]) {// open source OSPhP. COM. CN Return checkdate ($ dateArr [1], $ dateArr [2], $ dateArr [0]); } Return false; } Function check_time ($ time) {// check whether the time is valid // OSPHP. COM. Cn open source $ TimeArr = explode (":", $ time ); If (is_numeric ($ timeArr [0]) & is_numeric ($ timeArr [1]) & is_numeric ($ timeArr [2]) { // Open source code OSPHP. COM. Cn If ($ timeArr [0]> = 0 & $ timeArr [0] <= 23) & ($ timeArr [1]> = 0 & $ timeArr [1] <= 59) & ($ timeArr [2]> = 0 & $ timeArr [2] <= 59 )) // PHP open source code Return true; Else Return false; } Return false; } Function DateDiff ($ date1, $ date2, $ unit = "") {// Time comparison function, returns the seconds, minutes, hours, or days of difference between two dates Switch ($ unit ){ Case's ': $ Pidend = 1; Break; Case 'I ': $ Pidend = 60; // OSPHP. COM. CN Break; Case 'H ': $ Pidend = 3600; Break; Case 'D ': $ Pidend = 86400; Break; Default: $ Pidend = 86400; } $ Time1 = strtotime ($ date1 ); $ Time2 = strtotime ($ date2 ); If ($ time1 & $ time2) // OSPHP.com. CN Return (float) ($ time1-$ time2)/$ pidend; Return false; } ?>