Question

我有一个小脚本来处理登录我的CMS。查询工作正常，但我认为我对SESSIONS有问题，因为即使用户名和密码正确，它也会重定向到登录页面。我有以下代码。请帮我解决这个问题。提前谢谢。

// checklogin.php ....

<?php
include("db/dbconnect.php");

mysqli_select_db($connect, $db);

// username and password sent from signup form
$username = mysqli_real_escape_string($connect, $_POST['username']);
$password = mysqli_real_escape_string($connect, $_POST['password']);

$sql = "SELECT username, password FROM login WHERE username = '$username' AND password = '$password'";
$result = mysqli_query($connect, $sql) or die('Error : ' .  mysqli_error($connect));

// Mysql_num_row is counting table row
$count = mysqli_num_rows($result);

// If result matched $username and $password, table row must be 1 row
if($count == 1)
{

    //Register $username, $password and redirect to mainpage"
    $_SESSION['username'] = $username;
    $_SESSION['password'] = $password;

    header("location:about.php");
}
else {
echo "Invalid Username or Password. Please try again.";
echo "<meta http-equiv=Refresh content=5;url=index.php>";
}
?>

// about.php

<?php 
//check if user is logged on;
session_start();
if(!isset($_SESSION['username']) )
{
    header("location:index.php");
}
?>

Answer 1

您需要在为其分配用户名和密码之前启动会话。在你的＆＃34;如果＆＃34; condition（$ count == 1），您直接指定用户名和密码。在这些作业之前加上这一行：

在session_start（）;

所以，现在你的＆＃34;如果＆＃34;条件变成了这个：

if($count == 1)
{

    session_start();
    $_SESSION['username'] = $username;
    $_SESSION['password'] = $password;

    header("location:about.php");
}

我猜，问题是什么。如果有效，请告诉我。

Answer 2

添加session_start（）;在checklogin.php中这将有助于你

<?php
 session_start();  //missing in checklogin.php
include("db/dbconnect.php");
mysqli_select_db($connect, $db);

PHP MYSQL登录脚本会话无法正常工作

2 个答案: