php - 让用户更改自己的密码？

Question

我刚开始学习 php 和 sql，所以请放轻松，我知道我在某些地方会出错。我试图让用户登录并能够更改他们的密码。我尝试了一个脚本，我认为它应该可以工作，但我想我做错了什么，因为它只会链接到 php 功能页面，根本不会更改密码。这是我的脚本:

HTML 格式:

<form method="POST" action="includes/changepassword.php">
<p><input type="password" name="oldpasswd" id="oldpasswd" maxlength="30" placeholder="Old Password"></p>
<p><input type="password" name="newpsswd1" id="newpsswd1" maxlength="30" placeholder="New Password"></p>
<p><input type="password" name="newpsswd2" id="newpsswd2"maxlength="30" placeholder="Confirm Password"></p>
<input type="submit" name="submit" id="submit" value="change password">

changepassword.php 文件:

 <?php
require_once("session.php"); 
require_once("functions.php");
require('_config/connection.php');
function changepassword ($oldpasswd, $newpasswd1, $newpasswd2) {
    /*
     * RETURNS
     * 0 - if password changed
     * 1 - if new passwords are not equal
     * 2 - if user authentification problems
     */


        $oldpasswd = ($_POST['oldpasswd']);
        $newpasswd1 = ($_POST['newpasswd1']);
        $newpasswd1 = ($_POST['newpasswd2']);




    if ($newpasswd1 != $newpasswd2) {
        return 1;
    }

    //check user logged in changes OWN passwd
    $sql = "SELECT password FROM ptb_users WHERE id = ".$_SESSION['user_id'];
    $result = mysql_query($sql)or die('User not found: ' . mysql_error());

    if (md5($oldpasswd)==$result) { 

        //Encrypt $emailpassword in MD5 format for the database
        $md5_np=md5($newpasswd1);

        // Make a safe query
        $query = sprintf("UPDATE `ptb_users` SET `password` = '%s' 
                    WHERE `id` = ".$_SESSION['user_id'],
                    mysql_real_escape_string($md5_np));

        mysql_query($query)or die('Could not update password: ' . mysql_error());
        return 0;
    } else {
        return 2;
    }


}   
?>

我做错了什么？

Answer 1

it will just link to the php function page and not change the password at all

您告诉 HTML 表单执行此操作:<form method="POST" action="includes/changepassword.php"> .但另一方面，您永远不会调用您的函数。