php登录脚本未定义变量：_session脚本
[英]php login script Undefined variable: _session script
问题描述
我正在尝试使用登录脚本burt，但出现此错误未定义变量：_session参见页面下方
//checklogin.php
<?php
ob_start();
$host="localhost"; // Host name
$username="xxxxx"; // Mysql username
$password="xxxx"; // Mysql password
$db_name="test"; // Database name
$tbl_name="members"; // Table name
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
// Define $myusername and $mypassword
$myusername=$_POST['myusername'];
$mypassword=$_POST['mypassword'];
// To protect MySQL injection (more detail about MySQL injection)
$myusername = stripslashes($myusername);
$mypassword = stripslashes($mypassword);
$myusername = mysql_real_escape_string($myusername);
$mypassword = mysql_real_escape_string($mypassword);
$sql="SELECT * FROM $tbl_name WHERE username='$myusername' and password='$mypassword'";
$result=mysql_query($sql);
// Mysql_num_row is counting table row
$count=mysql_num_rows($result);
// If result matched $myusername and $mypassword, table row must be 1 row
if($count==1){
// Register $myusername, $mypassword and redirect to file "login_success.php"
$_session['name']= myusername;
$_session['pass']= mypassword;
header("location:login_success.php");
}
else {
echo "Wrong Username or Password";
}
ob_end_flush();
?>
//login_success.php
// Check if session is not registered, redirect back to main page.
// Put this code in first line of web page.
<?php
session_start();
if(!$_session['name']= myusername){
header("location:main_login.php");
}
?>
<html>
<body>
Login Successful
</body>
</html>
2 个解决方案
解决方案1
3 已采纳 2012-09-26 15:11:31
是$_SESSION而不是$_session您还需要在页面顶部添加session_start()
从PHP DOC
PHP中的变量用美元符号表示，后跟变量名称。 变量名称区分大小写。
解决方案2
2 2012-09-26 15:12:10
$_SESSION将大写。 在您的代码中，全部为小写：
if(!$_session['name']= myusername){
更改为（还将$添加到myusername）：
if(!$_SESSION['name']= $myusername){
未定义的变量：_SESSION php登录脚本
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