Question

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首先，我知道有一些像这样的类似问题，但没有能够帮助我的问题。

我正在尝试检查数据库中是否已存在用户名或电子邮件，我已将它们设置为数据库中的唯一，但是想要这样，我可以显示用户名/电子邮件的单独错误。

现在它只是在尝试注册时输出一个白页，我花了好几个小时试图自己弄清楚..任何帮助都将受到高度赞赏。

我添加了有关有问题的代码的评论，我无法开始工作。

这是我的代码：

<?php
// Include database connection and functions here.
include 'db_connect.php';
include 'functions.php';

// The hashed password from the form
$password = $_POST['p'];
// Create a random salt
$random_salt = hash('sha512', uniqid(mt_rand(1, mt_getrandmax()), true));
// Create salted password (Careful with the chilli)
$username = $_POST['username'];
$email = $_POST['email'];



//Start of problematic code

$check_stmt = $mysqli->prepare("SELECT * FROM members WHERE username=? OR email=?");
$check_stmt->bind_param('ss', $username, $email);
$check_stmt->execute();
$check_result = $check_stmt->get_result();
while ($row = $check_result->fetch_assoc()) {
    if ($row->num_rows > 0)
    {
        if ($row['username'] > '')
        {
            header("Location: '..\..\..\?RegUserExsist=1'");
        }
        else if ($row['email'] > '')
        {
            header("Location: '..\..\..\?RegEmailExsist=1'");
        }
    }

//end of problematic code



    else if(!filter_var($email, FILTER_VALIDATE_EMAIL))
    {
        header("Location: '..\..\..\?RegInvalidEmail=1'");
    }
    else if (empty($username))
    {
        header("Location: '..\..\..\?RegInvalidUser=1'");
    }
    else if (empty($password))
    {
        header("Location: '..\..\..\?RegInvalidPass=1'");
    }
    else
    {
$password2 = hash('sha512', $password.$random_salt);

if ($insert_stmt = $mysqli->prepare("INSERT INTO members (username, email, password, salt) VALUES (?, ?, ?, ?)"))
{
$insert_stmt->bind_param('ssss', $username, $email, $password2, $random_salt);
// Execute the prepared query.
$insert_stmt->execute();

header("Location: '..\..\..\?success=1'");

}
else
{
header("Location: '..\..\..\?regfailed=1'");
}}}
?>

Answer 1

我使用PDO并且我有这个代码检查是否已经使用了用户名

<?php    
/* Create a new PDO object with database connection parameters */
    $dbh = new PDO('mysql:host='.DB_HOST.';dbname='.DB_NAME.'', DB_USER, DB_PASS);

    // Create statement object
    $stmt = $dbh->prepare("SELECT username FROM users WHERE username = :username");

    $stmt->bindValue(":username", $user);

    $stmt->execute();

    if($stmt->rowCount() != 0) {
        $this->setError('<span class="bold">Username</span> you have selected has already been used by another member in our database. Please choose a different Username!');
    }

mysqli注册脚本，检查是否存在用户或电子邮件

1 个答案: