php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; //oSPHP.COM.CN break; case 'h': $dividend = 3600; break; case 'd': $dividend = 86400; break; //开源OSPhP.COM.CN default: $dividend = 86400; } $time1 = strtotime($date1); $time2 = strtotime($date2); if ($time1 && $time2) return (float)($time1 - $time2) / $dividend; return false; } 复制代码

几天, 几分钟, 几秒