我使用以下代码编写了一个简单的PHP倒数计时器：
list($date,$time)=explode(" ",$compounddate);
list($thour,$tminute,$tsecond)=explode(":",$time);
list($tyear,$tmonth,$tday)=explode(":",$date);
$date=str_replace(":","/",$date);
$target = mktime($thour,$tminute,$tsecond,$tmonth,$tday,$tyear) ;
$today = time () ;
$difference =($target-$today) ;
$days = floor(abs($difference/86400));
$hours = floor(abs($difference%86400/3600));
$minutes =floor(abs($difference%3600/60));
$seconds = floor(abs($difference%60));
$date = date("F d, Y ",strtotime($date));
$time = date("g:i:s A",strtotime($time));
$past_future="";
$boolpast_future=true;
if($difference<0) {
$past_future="<strong> Time since ".$date." at ".$time.": </strong>";
$boolpast_future=false;
}
else {
$past_future="<strong> Countdown to ".$date." at ".$time.": </strong>";
$boolpast_future=true;
}
}
（$thour、$tminute等平均目标小时、目标分钟...
但是，此代码无法正确计算倒计时时间。如何解决这个问题？谢谢！
date_default_timezone_set('Asia/Tokyo');
$target = new DateTime('2011-06-01 05:00:00');
$now = new DateTime;
$diff = $target->diff($now);
if ($target > $now) {
echo $diff->format('%a days, %h hours, %i minutes to go');
} else {
echo $diff->format('%a days, %h hours, %i minutes too late');
}