Home >Backend Development >PHP Problem >php determines whether there is login

php determines whether there is login

藏色散人Original: 2019-10-12 10:57:423107browse

php determines whether the user is logged in

The following example uses Session to determine whether the user is logged in:

functions.php

<?php 
function loggedIn(){ 
    //通过 $_SESSION  来判断用户是否登录
    if(!$_SESSION[&#39;loggd&#39;]){ 
        echo&#39;<form action="checkLogin.php" method="post"> 
        <p> 
            Username:<br> 
            <input type="text" name="username"> 
        </p> 
        <p> 
            Password:<br> 
            <input type="password" name="username"> 
        </p> 
        <p> 
            <input type="submit" name="submit" value="Log In"> 
        </p> 
        </form>&#39;; 
    }else{  // 登录显示欢迎页面
        echo &#39;Welcome, &#39;.$_SESSION[&#39;username&#39;]; 
    } 
} 
?>

index.php

<?php 
//Start the session 
session_start(); 
//This is a simplified HTML Document 
?> 
<html>
<head>
<title>My Page</title>
</head>
<body>
     <?php 
    // 引入 functions.php 文件
    require_once("functions.php"); 
    //登录状态显示用户名，未登录显示登录表单
    logedIn(); 
    ?> 
</body>
</html>

For more PHP related knowledge, please visit PHP Chinese website!

The above is the detailed content of php determines whether there is login. For more information, please follow other related articles on the PHP Chinese website!

Statement：

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Previous article：PHP cannot connect to the databaseNext article：PHP cannot connect to the database

See more

php determines whether there is login

Related articles