PHP/MySQL : User Sign Up Page

Question

最近我一直在创建一个 PHP/MySQL 用户注册页面，但我遇到了一个问题，当我调用该函数时它一直出错，它返回给我:

"Fatal error: Call to undefined function signUp() in /Users/Ronald/Desktop/PHP/Brighten/admin/signup-method.php on line 65"

我想知道为什么会这样。我敢肯定这个问题一定已经在某个地方得到了回答，但我不太擅长搜索它，所以感谢你的关注并提前致谢

错误信息:

它应该是什么样子:

<?php 
$dbhost = 'database_host';
$dbuser = 'database_user';
$dbpass = 'database_password';
$conn = mysqli_connect($dbhost, $dbuser, $dbpass, $dbuser);
    if (!$conn){
        die('cannot connect to mysql');
    }


    if(isset($_POST['username'])){
        $username = $_POST['username'];
    }
    if(isset($_POST['password'])){
        $password = $_POST['password'];
    }
    if(isset($_POST['cpassword'])){
        $cpassword = $_POST['cpassword'];
    }
    if(isset($_POST['email'])){
        $email = $_POST['email'];
    }


    function addUser(){
        $query = "INSERT INTO websiteusers (user,password,email) VALUES ('$username','$password','$email')"; 
        $data = mysql_query ($query)or die(mysql_error()); 
        if($data) { 
            $result = '<div class="alert alert-success">Thank you, <strong>'.$_POST['name'].'</strong>! You are successfully registered</div>';
    }

    function signUp(){
        $query = "SELECT * FROM users WHERE user = '$username' AND pass = '$password'";

        $result = mysqli_query($conn, $query);
            if(!$row = mysqli_fetch_array($result)){
                addUser();
            }else{
            die("   <div class='alert alert-warning'>
                        <strong>Warning!</strong> You're already an registered user!
                    </div>");
            }
        }        
    }




    if ($_POST["submit"]) {
        if (!$_POST['username']) {
            $error="<br />Please enter your name";
        }
        if (!$_POST['password']) {
            $error.="<br />Please enter your password";
        }
        if (!$_POST['email']) {
            $error.="<br />Please enter your email";
        }
        if ($password != $cpassword){
            $error.= "<br/> Please confirm password is the same";
        }   
        if ($error) {
            $result='<div class="alert alert-danger"> There were error(s)in your form: '.$error.'</div>';
        }
        signUp();
    }


  ?>

Answer 1

您在添加用户功能中犯了一个错误。两个 { 已打开，但只有一个 } 已关闭。这就是 signUp 未定义的原因，因为它现在是 adduser 函数的一部分。