PHP时间重叠检查

Question

我需要检查两个时间范围是否重叠。 例如，

time1：13：20-13：40
时间2：14：00-14：30 时间3：13：30-13：50

time1和time3重叠。我该如何检查？

time1和time2的差距为20分钟，但如果差距小于30分钟，也应视为重叠。

任何人都可以帮助我，非常感谢。

Answer 1

此？

$_30mins = 60*30;  // 60 secs * 30 minutes
// make the times into seconds
$times = array();
$times[] = array("from"=>mktime(13,20,0,1,1,1970),"to"=>mktime(13,40,0,1,1,1970));
$times[] = array("from"=>mktime(14,00,0,1,1,1970),"to"=>mktime(14,30,0,1,1,1970));
$times[] = array("from"=>mktime(13,30,0,1,1,1970),"to"=>mktime(13,50,0,1,1,1970));

foreach($times as $key=>$val) {
   foreach($times as $key2=>$val2) {
      if ($key2!=$key && (($val["from"]>=$val2["from"] && $val["from"]<=$val2["to"]) || 
         (abs($val["to"]-$val2["from"])<$_30mins))) {
         echo "time $key overlaps with $key2<br>";
         break;
      }
   }
}