Question

我的登录页面有问题。我仍然是php的新手，我的老师告诉我使用php创建一个登录页面，你从文本文件中读取你的用户名和密码..如果用户名是正确的，那么应该转到下一页，如果没有用户名，它将会打印输出说没有用户名。

请帮助..

这些是我的login.php

<html>
<head>
<link rel="stylesheet" type="text/css" href="style.css">
</head>
<body>

    <form action="logg.php" method="POST">
        <br /> Name: <input type="text" name="uname"><br /> Password: <input
            type="password" name="password" size="15" maxlength="30" /> <br /> <input
            type="submit" name="login" value="Post!"> <br />
    </form>

    </body>
    </html>

这些是我的login.php

<?php
    if (isset($_POST['login'])){
$myFile = "accounts.txt";

$myFileLink = fopen($myFile, 'r');

$myFileContents = fread($myFileLink, filesize($myFile));

fclose($myFileLink);

echo $myFileContents;
?>

答案只显示了所有的名字，但我的老师要求我做的只是阅读某些名字..而且我不知道该怎么做..请帮忙

这应该是这样的：

I dont know what to do..

Answer 1

您可以使用正则表达式在.txt

中查找特定字符串（username = Bob）

http://php.net/manual/en/function.preg-match.php

或者您可以尝试使用反序列化

// set data for example 
$store = array( 
        'username' => 'Bob', 
        'password' => 'YouShouldNotPass' 
    ); 

$fp = fopen('pass.txt','w'); 

fwrite($fp,serialize($store)); 


// Reading the data 
$passtxt = file_get_contents('pass.txt'); 
$info = unserialize($passtxt); 

echo $info['username'];

或者你可以试试json： http://php.net/manual/en/function.json-decode.php

Answer 2

我希望它会给你一些直觉，告诉你如何在登录表单提交后阅读特定的用户名和匹配。

$myFile = "accounts.txt";
//$string = file_get_contents($myFile); //you've to read it like this

$string = 'Hanna,2302 Lala,ha2302'; // I assume you have this data on file

$username_password = explode(' ',$string);

foreach($username_password as $u_p){

 list($username,$password) = explode(',',$u_p);  //map it to 2 different variable
 // you can add any kind of condition to match specific user after login
 echo "username = $username & password = $password <br/>";
}

修改

<?php if (isset($_POST['login'])){ $myFile = "accounts.txt"; //$string = file_get_contents($myFile); //you've to read it like this $string = 'Hanna,2302 Lala,ha2302'; // I assume you have this data on file $username_password = explode(' ',$string); foreach($username_password as $u_p){ list($username,$password) = explode(',',$u_p);//map it to 2 different variable // you can add any kind of condition to match specific user after login echo "username = $username & password = $password <br/>"; } } ?>

使用php在文本文件中写入和读取用户名和密码功能

2 个答案: