Notice: Undefined variable: _SESSION in Z:\Apache24\htdocs\doit.php on line 10

文通网 2018年07月04日 PHP

<?php

$conn=mysqli_connect('localhost', 'root', 'mysql2016', 'xuanke');

mysqli_query($conn,'set names utf8');

$name=$_GET['name'];
$typename=$_GET['typename'];
$score=$_GET['score'];
$username=$_SESSION['hymc'];
$stuname=$_SESSION['huiyuan'];
//if(mysql_query("select * from xuanke where username='$_SESSION['hymc']' and name='$name'") or die("操作失败！"))

$sqlstr="SELECT name FROM xuanke WHERE username='$username' and name ='$name' ";
$result=mysqli_query($conn,$sqlstr) or die();
$row=mysqli_fetch_array($result);
if($row)
{
echo"<script>alert('您你已经选了此课程！');history.go(-1)</script>";
}
else
{
if(mysqli_query($conn,"insert into xuanke(username,stuname,name,typename,score)values('$username','$stuname','$name','$typename','$score')"))
{

}
else
{

}
}