Question

我刚刚开始学习PHP和Mysql，我试图创建注册表单，它需要5个字符串并发送到我已经在phpMyAdmin中创建的数据库。问题是，在填写表单并按下提交按钮后，数据库中没有任何内容。即使我将输入字段留空并按提交，也不会显示错误消息。我通过执行小查询来测试连接：从数据库插入和选择数据，它似乎工作正常。你能不能给我一些线索，这段代码可能有什么问题？我现在好好与它斗争好几天了。

<?php include_once ('connect.php'); 
?>
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">


    <title>Signup Page</title>

    </head>
    <body>

<?php

if(isset($_POST['submit_signup'])) {

    $user_firstname         = $db->real_escape_string(htmlentities($_POST['user_firstname']));
    $user_lastname          = $db->real_escape_string(htmlentities($_POST['user_lastname']));
    $user_username          = $db->real_escape_string(htmlentities($_POST['user_username']));
    $user_email             = $db->real_escape_string(htmlentities($_POST['user_email']));
    $user_password          = sha1($_POST['user_password']);


    if ($user_firstname == '' || $user_lastname == '' || $user_email == '' || $user_username == '' || $user_password == '') {

        $error = "Please fill in all fields!";

    } else { 

        $duplicates_query = $db->query("SELECT user_username FROM sd_users WHERE user_username = '$user_username'");

        $duplicate = $duplicates_query->num_rows;

        if($duplicate == 1) {

            $error = "Username:" . $user_username . "already exist, please pick something else!";

        } else {

            $result = $db->query("INSERT INTO `sd_users` (`idusers`, `user_firstname`, `user_lname`, `user_username`, `user_password`, `user_email`)
            VALUES (NULL, '$user_firstname', '$user_lastname', '$user_username', '$user_password', '$user_email', NOW())");



        }

    }
}
?>
        <div class="signup-form">
           <form action="signup.php" method="post">

            <input type="text" name="user_firstname" placeholder="First Name">
            <input type="text" name="user_lastname" placeholder="Second Name">
            <input type="text" name="user_email" placeholder="Email Address">
                <input type="text" name="user_username" placeholder="Username">
            <input type="password" name="user_password" placeholder="Password">

                <button type="submit" name="submit_signup">Sign Up</button>

        </div>
    </body>
</html>

这是我的connect.php文件：

<?php



$db = new mysqli('localhost', 'root', '', 'supportdesk');

if($db->connect_errno) {
echo $db->connect_error;
}
?>

PHP中注册表单的问题 - php代码不将其数据发送到数据库

0 个答案: