mysql 错误显示不正确

Question

我正在按照本教程创建我正在处理的注册数据库。我一直在反复看视频，然后看着 cmets 试图找到解决我的问题的方法。

我遇到的问题是我的设置没有正确显示我的数据库。我有一个用户名为“lowheartrate”的用户名，但是当我将其放在用户名字段中并尝试使用它登录时，它告诉我我的其他错误之一，
“我们找不到那个用户名。你注册了吗？”

很高兴这有效，但我也需要其他人也可以工作。特别是那些不工作的是以下错误：

   The 'user_active' error.  

   The 'user_exists' error.

这是与我遇到的问题相关的代码：

我的 login.php 显示代码错误：

users.php 代码将它们连接在一起并告诉要做什么：

general.php：

init.php：

更好地查看 users.php：

<?php
function user_exists($username) {
    $username = sanitize ($username);
    return  (mysql_result(mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `username` = '$username'"),0) == 1) ? true : false;
    }

function user_active($username) {
    $username = sanitize ($username);
    return  (mysql_result(mysql_query("SELECT COUNT(`user_id`) FROM `users` WHERE `username` = '$username' AND `active` = 1"), 0) == 1) ? true : false;
    }
?>

更好地查看 login.php：

<?php
include ('core/init.php');

if (empty($_POST) === false) {
    $username = $_POST['username'];
    $password = $_POST['password'];

    if (empty($username) == true || empty($password) == true) {
        $errors[] = 'You need to enter a username and password.';
    } else if (user_exists($username) == false) {
        $errors[] = 'We can\'t find that username. Have you registered?';
    } else if (user_active($username) == false) {
        $errors[] = 'You haven\'t activated your account.';
    } else {
        // here
    }

    print_r($errors);
}
?>

更好地了解 init.php：

<?php
session_start();
error_reporting(0);

require 'database/connect.php';
require 'functions/general.php';
require 'functions/users.php';

$errors = array();
?>

更好地了解general.php：

<?php
function sanitize($data) {
    return mysql_real_escape_string($data);
}
?>

更好地了解 connect.php：

<?php
$connect_error = 'Sorry we\'re experiencing connection issues.';
$con = mysqli_connect('localhost','root','');
mysqli_select_db($con,'lr') or die($connect_error);
?>

查看表单（login.php 小部件）：

<div class="widget">    
    <h2>Returning Member?</h2>
    <div class="inner">

        <form action="login.php" method="post">
            <ul id="login">
                <li>
                    <input type="text" name="username" placeholder="Username" autofocus  >
                </li>

                <li>
                    <input type="password" name="password" placeholder="Password"  >
                </li>

                <li>
                    <input type="submit" value="Log in" >
                </li>

                <li>
                    <a href="register.php">Create an Account</a>
                </li>
            </ul>
        </form>

    </div>
</div>

不确定是否重要，但这是显示它的 index.php：

<?php
$pageTitle = 'gLounge - Welcome to gLounge!';
include('includes/php/header.php');
?>

            <!-- Middle content section -->
            <div class="middle">
                <div class="container">
                    <div class="col-md-9 content">
                        <h2>Use gLounge42 as your new source to connect with fellow gamers. We have plenty for you to look at.</h2>
                        <p>

                            gLounge42 allows all types of gamers on all types of consoles/platforms connect with each other with 
                            unlimited amount of reasons to do so. Here at gLounge42 you can chat with them and go as far as posting 
                            in forums to get members for you Call of Duty clan. Possibilities are endless so go ahead and get your 
                            account setup now with gLounge42!

                        </p>
                        <div class="to-tutorial">   
                            <p><strong>Register an Account to get started:</strong></p>
                            <a href="register.php" class="btn btn-success">Register</a>
                        </div>
                    </div>
                    <!-- Includes the login widget on the top right side of page -->
                <?php include('includes/widgets/login.php');?>
                    <!-- Includes the side navigation area --> 
                <?php include('includes/php/sideNavigation.php');?>
                </div>
            </div>
<?php
include('includes/php/footer.php')
?>      

我正在使用的数据库元素：

连接到数据库的用户：

如果需要更多信息，请告诉我。
最好的问候，
编码

Answer 1

init.php

<?php
session_start();
error_reporting(E_ALL);//I change this line always use this. During 
//the production. after you finish you can change it. 

require 'database/connect.php';
require 'functions/general.php';
require 'functions/users.php';

$errors = array();
?>

阅读评论，无论您在答案中的何处找到它们。 Connect.php

<?php
//Your were mixing the mysqli and mysql, here you are using mysqli_ function But method you are 
//using msysql one so change it to mysql function



$connect_error = 'Sorry we\'re experiencing connection issues.';
$con = mysql_connect('localhost','root','');
mysql_select_db('lr',$con) or die($connect_error);//Database name should be first
?>

users.php

<?php

require 'database/connect.php';//You were missing connection here.
function user_exists($username) {
    $username = sanitize ($username);
    echo $username;
    //$result=or die(mysql_error());

    if(mysql_num_rows(mysql_query("SELECT `user_id` FROM `users` WHERE `username` = '$username'"))==1)        return TRUE; else     return FALSE;
    //if(mysql_num_rows(mysql_query()== 1)) 
    }

function user_active($username) {
    $username = sanitize ($username);
if(mysql_num_rows(mysql_query("SELECT `user_id` FROM `users` WHERE `username` = '$username' AND `active`='1'" ))==1)        return TRUE; else     return FALSE;    }
?>

Answer 2

首先停止使用mysql。将 mysqli_* 函数与准备好的语句或 PDO 一起使用。

您在 login.php 中的 if 语句看起来不错。尝试在 user.php 中使用它：

$bool = (mysql_num_rows(mysql_query("your query")) == 1) ? true : false; 

现在您正在检查已返回的行数。而且我不确定您是否可以在返回中添加 if 语句。所以现在你可以这样做了：

Return $bool;