email - sendmail.php not sending textbox data of form

I am trying this sendemail.php script. It is sending mail but it is not sending data entered in the textboxes of the form.

sendemail.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;
?>

index.html form

It sends mail but i receives like this:

Name:

Email:

Subject:

Message: