Check if date is legal

Check if date is legal function Check_date ($date) {//check date is legal date $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 legitimate 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 && $timeArr [0] <= && ($TIMEARR [1] >= 0 && $timeArr [1] <= 59) && ($TIMEARR [2] >= 0 && $timeArr [2] <= 59)) PHP Open Source Code return true; Else return false; } return false; } function DateDiff ($date 1, $date 2, $unit = "") {//Time comparison function, return two dates in seconds, minutes, hours or days Switch ($unit) { Case ' s ': $dividend = 1; Break Case ' I ': $dividend = 60; OSPHP.COM.CN Break Case ' H ': $dividend = 3600; Break Case ' d ': $dividend = 86400; Break Default $dividend = 86400; } $time 1 = strtotime ($date 1); $time 2 = strtotime ($date 2); if ($time 1 && $time 2)//osphp.com.cn return (float) ($time 1-$time 2)/$dividend; return false; } ?> Copy Code

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