时间比较函数,返回两个日期相差几秒、几分钟、几小时或几天

function DateDiff($date1, $date2, $unit = "") { //时间比较函数,返回两个日期相差几秒、几分钟、几小时或几天switch ($unit) {case 's':$dividend = 1;break;case 'i':$dividend = 60;break;case 'h':$dividend = 3600;break;case 'd':$dividend = 86400;break;default:$dividend = 86400;}$time1 = strtotime($date1);$time2 = strtotime($date2);if ($time1 && $time2)return (float)($time1 - $time2) / $dividend;return false;}

 

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