发送邮件.php不发送表单的文本框数据

我正在尝试这个发送电子邮件.php脚本。它正在发送邮件，但不发送在表单文本框中输入的数据。

发送电子邮件.php

<?php
header('Content-type: application/json');
$status = array(
    'type'=>'success',
    'message'=>'Email sent! We Will get back to you soon. :)'
);
$name = @trim(stripslashes($_POST['name'])); 
$email = @trim(stripslashes($_POST['email'])); 
$subject = @trim(stripslashes($_POST['subject'])); 
$message = @trim(stripslashes($_POST['message'])); 
// $name = $_POST['name']; 
// $email = $_POST['email']; 
// $subject = $_POST['subject']; 
// $message = $_POST['message']; 
$email_from = $email;
$email_to = 'dhaval@geekslabstudios.com' . ' , ' ;
$email_to .='kamal@geekslabstudios.com';
$body =  'Name: ' . $name . "'n'n" . 'Email: ' . $email . "'n'n" . 'Subject: ' . $subject . "'n'n" . 'Message: ' . $message;
$success = @mail($email_to, $subject, $body, 'From: <'.$email_from.'>');
echo json_encode($status);
die;
?>

索引.html窗体

<form id="main-contact-form" class="contact-form" name="contact-form" method="post" action="sendemail.php" role="form">
                <div class="row">
                    <div class="col-sm-5">
                        <div class="form-group">
                            <input type="text" name="name" id="name" class="form-control" required="required" placeholder="First Name">
                        </div>
                        <div class="form-group">
                            <input type="text" class="form-control" required="required" placeholder="Last Name">
                        </div>
                        <div class="form-group">
                            <input type="text" name="email" id="email" class="form-control" required="required" placeholder="Email address">
                        </div>
                        <div class="form-group">
                            <button type="submit" class="btn btn-primary btn-lg">Send Message</button>
                        </div>
                    </div>
                    <div class="col-sm-7">
                        <textarea id="message" name="message"  required="required" class="form-control" rows="8" placeholder="Message"></textarea>
                    </div>
                </div>
            </form>

它发送邮件，但我收到这样的邮件：

名字：

电子邮件：

主题：

消息：