求大神帮忙看看哪里错了
<br><br>if (!isset($_SESSION["sn"])){<br>$_SESSION['sn']=0;<br>setcookie('sn',$sn,time()+1);<br><br> if($_POST["submit"]){<br> if($sn=3)<br> {alert("抱歉，您已经点击了3次");<br> location.href="zp.php";exit();<br> }<br> elseif ($sn=="tull")<br> {alert("123");<br> location.href="zp.php";exit();<br> }<br> $newitem=$_POST["zp_user"];<br> $sql="insert into vote (awards,sn,pnone) values (1,'$sn',1)";<br> if(mysql_query($sql))<br> { <br> $sn==$_SESSION['sn']+1;<br> <br>}}<br> if($_POST["submit2"]){<br> if(empty($_POST['sn']))<br>$_SESSION['zp_user']=$_POST['pnone'];<br>$sql="insert into zp_user values('".($_POST['sn'])."')";<br> if(mysql_query($sql))<br> {<br> <br> }<br>}}------解决方案--------------------
if(mysql_query($sql))
{
$sn==$_session['sn']+1;
}
为何用==？
------解决方案--------------------
代码怎么都是分开的，这样很难看得到……
------解决方案--------------------
if($_post["submit"]){
if($sn=3)
应为 ==
------解决方案--------------------
if($_post["submit"]){
if($sn=3) // ==
{
------解决方案--------------------
= 是赋值
== if条件判断才用到
