指数php打开而不是发送消息

我已经搜索过了 PHP contact form script won't run/ page opens instead

click submit in html and run php code

但无法得到答案——它不起作用。

正如标题所示:我正在尝试将网页上显示的信息提交到列出的电子邮件地址。

以下是我的html的发送消息部分:

<form method="post" action="contactform/index.php">
    <div class="form-group">
        <label>First Name</label>
        <input name="fname" placeholder="Type Here">
        <div class="validation"></div>
    </div>
    <div class="form-group">
        <label>Last Name</label>
        <input name="surname" placeholder="Type Here">
        <div class="validation"></div>
    </div>
    <div class="form-group">
        <label>ID Number (For Voting)</label>
        <input name="idnumb" placeholder="Type Here">
        <div class="validation"></div>
    </div>
    <div class="form-group">
        <label>Address</label>
        <input name="addr" placeholder="Type Here">
        <div class="validation"></div>
    </div>
    <div class="form-group">
        <label>Email</label>
        <input name="email" type="email" placeholder="Type Here">
        <div class="validation"></div>
    </div>
    <div class="form-group">
        <label>Message</label>
        <textarea name="message" placeholder="Type Here"></textarea>
        <div class="validation"></div>
    </div>
    <label>*What is 2+2? (Anti-spam)</label>
    <input name="human" placeholder="Type Here">
    <div class="text-center"><button id="submit" name="submit" type="submit" value="Submit">Send Message</button></div>
</form>

这是页面底部的代码片段。

有一个contactform。js进行验证。然后是php文件索引。php位于服务器上名为contactform的文件夹中:

<?php
    $firstname = $_POST['fname'];
    $surname = $_POST['surname'];
    $idnumb = $_POST['idnumb'];
    $address = $_POST['addr'];
    $email = $_POST['email'];
    $message = $_POST['message'];
    $from = 'From: Test'; 
    $to = 'avahed87@gmail.com'; 
    $human = $_POST['human'];

    $body = "Registration from $firstname $surname\n ID:$idnumb\n  Email : $email\n Address : $address\n Message:\n $message";

    if ($_POST['submit'] && $human == '4') {                 
        if (mail ($to, $subject, $body, $from)) { 
            echo '<p>Your message has been sent!</p>';
        } else { 
            echo '<p>Something went wrong, go back and try again!</p>'; 
        } 
    } else if ($_POST['submit'] && $human != '4') {
    echo '<p>You answered the anti-spam question incorrectly!</p>';
    }
?>

基本上我需要发送此信息的电子邮件地址附加。我对网络开发还比较陌生,所以任何对教程的建议或参考都会很有帮助。

我模仿了 this article