Question

我一直在尝试制作登录页面，但总是说

＆＃34;注意：未定义的索引：myusername in 第3行和第34行的C：\ xampp2 \ htdocs \ loginsession \ login_success.php;

这里的checklogin.php：

<?php

$host="localhost"; // Host name 
$username=""; // Mysql username 
$password=""; // 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");

// username and password sent from form 
$myusername=$_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_start();
    $_SESSION['username'] = $myusername;
    $_SESSION['password'] = $mypassword;
    header("location:login_success.php");
}
else {
    echo "Wrong Username or Password";
} ?>

和这里的login_success.php：

<?php
session_start();
if($_SESSION['myusername']){
header("location:main_login.php");
}

＆GT;

Answer 1

变化

<?php
session_start();
if($_SESSION['username']){
    header("location:main_login.php");
}

到

if($_SESSION['myusername']){

Answer 2

有拼写错误:(用户名x myusername）

注意：未定义的索引：myusername

2 个答案: