我正在创建一个register.php,我现在处于创建“在数据库中的用户名和电子邮件检查”,不知何故,我总是得到一个错误。请帮我解决这个问题。由于警告:mysqli_num_rows()期望参数1是mysqli_result,布尔在第12行给出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";
}
}
?>
我已经检查很多次
$usernamesql = "SELECT * FROM 'users' WHERE username='$username'";
,但我仍然得到错误信息。请帮帮我。感谢您的帮助。
我已经这样做了,但我仍然没有收到“用户名已存在!”的消息。我只收到一条错误消息“注册用户失败” – Kirito
@Kirito,这是一个完全不同的问题,与问题标题中的错误无关。我建议你问一个新问题(在首先检查用户不存在于数据库中之后)。 – paxdiablo