需要帮助弄清楚为什么我的php代码惠特会话inst工作

Question

Im currently trying to do a login code by myself and i cant figure out how ot work whit session. 我目前正试图自己做一个登录代码，我无法弄清楚会话如何工作。 If anyone can examine my code and say were are the errors i would be much obliged. 如果有人可以检查我的代码并说是错误，那我将非常有责任。

Sorry for the lack of organization first time posting here. 抱歉，由于缺乏组织，第一次在此发布。

Sorry for my english(not my native language), im portuguese. 对不起，我的英语（不是我的母语）是葡萄牙语。

-index.php
    <html>
    <head>
    <?php session_start(); ?>
    <title> Login Page   </title>

    </head>

    <body>

    <form action="login2.php" method="post">

    <table width="200" border="0">
    <tr>
    <td>  UserName</td>
    <td> <input type="text" name="user" > </td>
    </tr>
    <tr>
    <td> PassWord  </td>
    <td><input type="password" name="pass"></td>
    </tr>
    <tr>
    <tr>
    <td> Email </td>
    <td><input type="email" name="email"></td>
    </tr>
    <tr>
    <td> <input type="submit" name="login" value="LOGIN"></td>
    <td><a href="logout.php">Logout</a></td>
    </tr>
    </table>
    </form>

    </body>
    </html>

     Home.php
    <?php   
    require_once 'database.php';  
    $res=mysql_query("SELECT * FROM users WHERE id=".$_SESSION['user']);
    $userRow=mysql_fetch_array($res); ?>
    <html>
    <head>
    <title> Home </title>
    </head>
    <body>
    <?php
    if(!isset($_SESSION['use'])) 
    {
    header("Location:Login.php");  
    }
    echo $userRow['userEmail']; 
    echo "Login Success";
    echo "<a href='logout.php'> Logout</a> "; 
    ?>
    </body>
    </html>

    logout.php
    <?php
    session_start();
    echo "Logout Successfully ";
    session_destroy();   // function that Destroys Session 
    header("Location: Login.php");
    ?>

     database.php
    <?php
    // this will avoid mysql_connect() deprecation error.
    error_reporting( ~E_DEPRECATED & ~E_NOTICE );
    // but I strongly suggest you to use PDO or MySQLi.

    define('DBHOST', 'localhost');
    define('DBUSER', 'root');
    define('DBPASS', '');
    define('DBNAME', 'database_sof');

    $conn = mysql_connect(DBHOST,DBUSER,DBPASS);
    $dbcon = mysql_select_db(DBNAME);
    ?>



     login2.php
    <?php
    require_once 'database.php';
    if(isset($_SESSION['user']))  {
    header("Location:home.php"); 
    }
    if(isset($_POST['login']))   {
    $user = $_POST['user'];
    $pass = $_POST['pass'];
    $email = $_POST['email'];

    if(empty($user)){
    echo "Please enter your username.";}  
    if(empty($pass)){
    echo "Please enter your passoword.";}   
    if(empty($email)){
    echo "Please enter your email.";}  
    $res=mysql_query("SELECT id, username, password FROM users WHERE email='$email'");
    $row=mysql_fetch_array($res);
    $count = mysql_num_rows($res); 
    if( $count == 1 && $row['password']==$pass ) {
    $_SESSION['user'] = $row['id'];
    session_start();
    header("Location: home.php");} else {
    echo $user;
    echo "<br>";
    echo $pass;
    echo "<br>";
    echo $email;
    echo "<br>";
    echo $count;
    echo "<br>";
    echo $row['password'];
    echo "<br>";
    echo "Incorrect Credentials, Try again...";
    }}?>

Answer 1

(sorry for my english) （对不起我的英语不好）

if you want to use $_SESSION variable in your file, you must write session_start() at the beginning of that file AND before any output (as Koala Yeung said). 如果要在文件中使用$ _SESSION变量，则必须在该文件的开头以及任何输出之前编写session_start（）（如Koala Yeung所说）。

somefile.php: somefile.php：

<?php
session_start();
...
//now you can read or edit $_SESSION

$_SESSION['bar'] = "bar";

$foo = $_SESSION['foo'];

需要帮助弄清楚为什么我的php代码惠特会话inst工作

问题描述

1 个解决方案

解决方案1
1 已采纳 2017-03-14 19:40:37

需要帮助弄清楚为什么我的php代码惠特会话inst工作

问题描述

1 个解决方案

解决方案1 1 已采纳 2017-03-14 19:40:37

解决方案1
1 已采纳 2017-03-14 19:40:37