How to display name after php login-PHP Problem-php.cn

How to display name after php login

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Release： 2023-02-27 16:18:01

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How to display name after php login

PHP session variables are used to store information about the user session (session), or to change the settings of the user session (session). Session variables store information for a single user and are available to all pages in the application.

We can use PHP to output the user name information stored in the session after logging in to display the name after php login.

Recommended: php server

How to display name after php login:

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Login</title>
</head>
<body>
    <form action="dologin.php" method="post">
 username:<input type="text" name="username" /><br/>
 password:<input type="password" name="password" />
        <input type="submit" value="提交"/>
    </form>
</body>
</html>

Copy after login

php login code:

dologin.php

<?php
    session_start();
    $username = $_POST[&#39;username&#39;]?$_POST[&#39;username&#39;]:&#39;&#39;;
    $password = $_POST[&#39;password&#39;]?$_POST[&#39;password&#39;]:&#39;&#39;;
    $link = mysqli_connect(&#39;localhost&#39;, &#39;root&#39;, &#39;root&#39;, &#39;test&#39;);
    mysqli_set_charset($link,&#39;utf8&#39;);
    $sql = "select password from user_dologin where username=&#39;".$username."&#39;";
    $res = mysqli_query($link,$sql);
    $result = mysqli_fetch_assoc($res);
 
    mysqli_close($link);
    if($result[&#39;password&#39;] == $password){
        $_SESSION[&#39;username&#39;] = $username;
        $_SESSION[&#39;password&#39;] = $password;//一般情况下session中不保存密码信息
        header("Location: index.php");
    }else{
        header("Location: login.html");//密码错误跳回登陆网页
    }

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Name code displayed after login:

<?php
session_start();
echo "username:".$_SESSION[&#39;username&#39;]."<br/>";
echo "password:".$_SESSION[&#39;password&#39;];

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Browser display effect:

username:zhangsan
password:123456

Copy after login

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