php的用户注册页面，能注册但在数据库显示不了，求各位大神解答，给高分！！

<?php
session_start();
include("admin/conn.php");
$name=$_POST[usernc];
$pwd1=$_POST[p1];
$pwd=md5($_POST[p1]);
$email=$_POST[email];
$truename=$_POST[truename];
$sfzh=$_POST[sfzh];
$tel=$_POST[tel];
$qq=$_POST[qq];
if($_POST[ts1]==1)
{
$tishi=$_POST[ts2];
}
else
{
$tishi=$_POST[ts1];
}
$huida=$_POST[tsda];
$dizhi=$_POST[dizhi];
$youbian=$_POST[yb];
$regtime=date("Y-m-j");
$lastlogintime=$regtime;
$logincishu=1;
$ip=getenv("REMOTE_ADDR");
$dongjie=0;
$sql=mysql_query("select * from user where name='".$name."'",$conn);
$info=mysql_fetch_array($sql);
if($info==true)
{
echo "<script>alert('该昵称已经存在!');history.back();</script>";
exit;
}
else
{
mysql_query("insert into user (name,pwd,dongjie,email,truename,sfzh,tel,qq,ip,tishi,huida,dizhi,youbian,regtime,lastlogintime,logincishu,pwd1) values ('$name','$pwd','$dongjie','$email','$truename','$sfzh','$tel','$qq','$ip','$tishi','$huida','$dizhi','$youbian','$regtime','$lastlogintime','$logincishu','$pwd1')",$conn);

$_SESSION['username'] = null;
$username=$name;
$_SESSION['producelist'] = null;
$producelist="";
$_SESSION['quatity'] = null;
$quatity="";
echo "<script>alert('恭喜，注册成功!');window.location='index.php';</script>";
}
?>

相关了解……