我正在創建一個register.php,我現在處於創建「在數據庫中的用戶名和電子郵件檢查」,不知何故,我總是得到一個錯誤。請幫我解決這個問題。由於警告:mysqli_num_rows()期望參數1是mysqli_result,布爾在第12行給出C: xampp htdocs medcares index.php
<?php
require_once('pages/connect.php');
if (isset($_POST['username']) && isset($_POST['password'])){
$username = mysqli_real_escape_string($connection, $_POST['username']);
$email = mysqli_real_escape_string($connection, $_POST['email']);
$password = md5($_POST['password']);
$repassword = md5($_POST['repassword']);
if ($password == $repassword) {
$fmsg = "";
$usernamesql = "SELECT * FROM 'users' WHERE username='$username'";
$usernameres = mysqli_query($connection,$usernamesql);
$count = mysqli_num_rows($usernameres);
if($count == 1){
$fmsg .= "Username Already Exist!";
}
$query = "INSERT INTO 'users' (username, password, email) VALUES ('$username', '$password', '$email')";
$result = mysqli_query($connection, $query);
if($result){
$smsg = "User Created Successfully.";
}else{
$fmsg .= "Failed to Register User";
}
} else {
$fmsg = "Password Do not Match";
}
}
?>
我已經檢查很多次
$usernamesql = "SELECT * FROM 'users' WHERE username='$username'";
,但我仍然得到錯誤信息。請幫幫我。感謝您的幫助。
我已經這樣做了,但我仍然沒有收到「用戶名已存在!」的消息。我只收到一條錯誤消息「註冊用戶失敗」 – Kirito
@Kirito,這是一個完全不同的問題,與問題標題中的錯誤無關。我建議你問一個新問題(在首先檢查用戶不存在於數據庫中之後)。 – paxdiablo