php 和 mysql 的注册页面不工作

Question

尝试创建一个注册页面以使用 php 将新用户添加到数据库中，我似乎无法获取要添加到数据库中的信息，这很可能是我所做的一些愚蠢的事情我的代码有误或遗漏了。

这是我的代码

<?php
    session_start();
?>

<!DOCTYPE html>
<html class="no-js">
<head>
        <meta charset="utf-8" />
        <meta http-equiv="X-UA-Compatible" content="IE=edge" />


    <title></title>
    <meta name="author" content="" />
    <meta name="description" content="" />

        <meta name="viewport" content="width=device-width, initial-scale=1" />


        <script src="boilerplate/js/vendor/modernizr-2.7.1.min.js"></script>


    <link rel="stylesheet" type="text/css" href="../css/party.css" media="screen" />

    <script type="text/javascript" src="javascript/jquery_min.js"></script>

    <script type="text/javascript" src="javascript/cookies.js"></script>


</head>

<body>




<?php include 'header.php'; ?>

<div id="container_register">

<div id="content_register">

    <h2>Register</h2>

    <?php
include "connect.php";
if (isset($_POST['formsubmitted'])) {
    $error = array(); //Declare An Array to store any error message

    if (empty($_POST['up_username'])) { //if no name has been supplied
        $error[] = 'Please Enter a name '; //add to array "error"
    } else {
        $name = $_POST['up_username']; //else assign it a variable

    }

    if (empty($_POST['up_email'])) {

        $error[] = 'Please Enter your Email ';

    } else {

if (preg_match("/^([a-zA-Z0-9])+([a-zA-Z0-9\._-])*@([a-zA-Z0-9_-])+([a-zA-Z0-9\._-]+)+$/",

            $_POST['up_email'])) {

            //regular expression for email validation

            $Email = $_POST['up_email'];

        } else {

            $error[] = 'Your EMail Address is invalid  ';

        }

 }


    if (empty($_POST['up_password'])) {

        $error[] = 'Please Enter Your Password ';

    } else {

        $Password = $_POST['up_password'];

    }

if (empty($error)) //send to Database if there's no error '



{ // If everything's OK...



        // Make sure the email address is available:

        $query_verify_email = "SELECT * FROM users  WHERE Email ='$Email'";

        $result_verify_email = mysqli_query($dbc, $query_verify_email);

        if (!$result_verify_email) { //if the Query Failed ,similar to if($result_verify_email==false)

            echo ' Database Error Occured ';

        }
if (mysqli_num_rows($result_verify_email) == 0) { // IF no previous user is using this email .



            // Create a unique  activation code:


            $query_insert_user =

                "INSERT INTO `users` ( `Username`, `Email`, `Password`) VALUES ( '$name', '$Email', '$Password')";


$result_insert_user = mysqli_query($dbc, $query_insert_user);

            if (!$result_insert_user) {

                echo 'Query Failed ';

            }

 echo '<div class="success">Thank you for

registering! </div>';

             } else { // If it did not run OK.
                echo '<div class="errormsgbox">You could not be registered due to a systemdiv>';

            }


        } else { // The email address is not available.

            echo '<div class="errormsgbox" >That email address has already been registered.</div>';

        }



    } else { //If the "error" array contains error msg , display them



        echo '<div class="errormsgbox"> <ol>';

        foreach ($error as $key => $values) {



            echo '  <li>' . $values . '</li>';



        }

        echo '</ol></div>';



    }



    mysqli_close($dbc); //Close the DB Connection

// End of the main Submit conditional.
    ?>

        <form name="signup" id="signup" action="register.php" method="post">

            <label for="up_username"><span class="required">*</span> Name</label>
            <input type="text" name="up_username" id="up_username" placeholder="First Surname" />

<br>
            <label for="up_email"><span class="required">*</span> Email</label>
            <input type="email" name="up_email" id="up_email" placeholder="username@email.com" />

<br>
            <label for="up_password"><span class="required">*</span> Password</label>
            <input type="password" name="up_password" id="up_password" />

<br>
            <label for="up_password_c"><span class="required">*</span> Confirm Password</label>
            <input type="password" name="up_password_c" id="up_password_c" />


            <div class="div_submit">

                <input id="register_submit" type="submit" value="Sign up" />
            </div>

        </form><!--#sign up end-->

    <p class="required">* Indicates a required field</p>

</div><!--content div end-->

</div><!--container div end-->

Answer 1

你写的If条件总是retrun false。

要解决此问题，请将提交按钮的名称属性设置为 formsubmitted，如下所示

<input id="register_submit" name= "formsubmitted" type="submit" value="Sign up" />

由于 formsubmitted 不存在于表单中，因此未为 $_POST['formsubmitted'] 设置值，因此永远不会执行 if 语句的 If part。

Answer 2

这是我经常使用的类似脚本，请随意更改。

<? 
  if ($_POST['submit']){
    $username = $_POST['username'];
    $password = md5($_POST['password']);
    $confirm = $_POST['confirm'];
    $email = $_POST['email'];

if (!$username || !$password || !$confirm || !$email){
    $response = "Please fill in all the boxes";
}else{

    $check = mysql_num_rows(mysql_query("SELECT * FROM users WHERE username='$username'"));
    if ($check != 0){
        $response = "Username taken, Please choose an alternative";
    }else{

    $check = mysql_num_rows(mysql_query("SELECT * FROM users WHERE email='$email'"));
    if ($check != 0){
        $response = "This Email has already been registered";
    }else{


            mysql_query("INSERT INTO `users` (`id`, `username`, `password`, `email`) VALUES ('', '$username', '$password', '$email');");
$response = "Account Created";

}
}
}
}

echo "$response"; ?>

php 和 mysql 的注册页面不工作

registration page with php and mysql not working

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