小编Ifa*_*dak的帖子

有一个语法错误，您的变量名称是 $hour，但最后您使用了 $hours。

$time1  = strtotime("02:40:00");
$time2 = strtotime("34:20:00");
$diff  = $time2 - $time1;

$hour   = floor($diff / (60 * 60));
$minute = $diff - $hour * (60 * 60);
//$final = $hours .":".floor( $minute / 60 );
$final = $hour .":".floor( $minute / 60 );

echo $final;