大神们，帮忙看看这段代码有什么错误，为什么改为10点可以，9点就不行了？

<?php

date_default_timezone_set("Asia/Shanghai");

//配置每天的活动时间段

$nowtime = time();
$starttimestr = date('H:i:s',time());

$ntime= date('H:i:s',time());

if ($ntime<"9:00:00")
{$endtimestr = "9:00:00";

}
elseif ($ntime>="9:00:00" and $ntime<"18:00:00")
{$endtimestr = "18:00:00";}

elseif ($ntime>"18:00:00")
{$endtimestr="9:00:00";}

if (date('w',time())<>4){
$endtimestr="2014-10-30 9:00:00";
$endtimestr="9:00:00";}

$endtime =strtotime($endtimestr);

if (date('w',time())<>4){
$endtimestr="9:00:00";}

?>

var EndTime=<?php echo "$endtime*1000";?>; var NowTime = new Date(); var dTime = NowTime.getTime()-<?php echo "$nowtime*1000";?>; var runtimes = 0; function GetRTime(){ var NowTime = new Date(); var dTimeNew = NowTime.getTime()-<?php echo "$nowtime*1000";?>; var dTimesM = Math.abs(Math.floor((dTimeNew-runtimes*1000-dTime)/1000)); if (dTimesM>1) { window.location.reload(); } var nMS = EndTime - NowTime.getTime()+dTime; var nH=Math.floor(nMS/(1000*60*60)) % 24; var nM=Math.floor(nMS/(1000*60)) % 60; var nS=Math.floor(nMS/1000) % 60; document.getElementById("RemainH").innerHTML=nH; document.getElementById("RemainM").innerHTML=nM; document.getElementById("RemainS").innerHTML=nS; runtimes++; setTimeout("GetRTime()",1000); } window.onload=GetRTime;

<?php

IF (date('w',time())>4){
if ($ntime>"9:00:00"){

$dday=7-date('w',time())+4-1;}
else
{$dday=7-date('w',time())+4;}
}

else IF (date('w',time()) if ($ntime>"9:00:00"){
$dday=4-date('w',time())-1;}
else
{$dday=4-date('w',time());}
}
else{
$dday=0;}

if($endtimestr=="9:00:00")
{echo "<div style='width:1080px;color:#9e001c; font-size:32px'><strong>交流抢购经验请加入南阳家电网会员QQ群：310332256<br/>距离周四9点活动开始还剩".$dday."天</strong><strong id='RemainH'>XX</strong>:<strong id='RemainM'>XX</strong>:<strong id='RemainS'>XX</strong></div>";}

elseif ($endtimestr>"18:00:00")
{echo "

";}
elseif (($endtimestr=="18:00:00"))
{echo "";}

?>

不错咯考虑一下就是那样

if ($ntime<"9:00:00")你这样是按照字符串比较了吧。。9卡头的字符肯定是大于所有时间段的了，加个0在前面

 if ($ntime<"09:00:00")

if ($ntime<"9:00:00")你这样是按照字符串比较了吧。。9卡头的字符肯定是大于所有时间段的了，加个0在前面
正解