联系表格不起作用（Materialise + PHP）

Question

我一直在尝试使用materializecss和PHP从我的联系表单发送消息。但由于一些奇怪的原因，我无法完成它。

我的PHP代码：

<?php
// Check for empty fields
if(empty($_POST['name'])      ||
   empty($_POST['email'])     ||
   empty($_POST['message'])   ||
   !filter_var($_POST['email'],FILTER_VALIDATE_EMAIL))
   {
   echo "No arguments Provided!";
   return false;
   }

$name = strip_tags(htmlspecialchars($_POST['name']));
$email_address = strip_tags(htmlspecialchars($_POST['email']));
$message = strip_tags(htmlspecialchars($_POST['message']));

$to = 'soundharyabharatiya@gmail.com'; 
$email_subject = "Website Contact Form:  $name";
$email_body = "You have received a new message from your website contact form.\n\n"."Here are the details:\n\nName: $name\n\nEmail: $email_address\n\nPhone: $phone\n\nMessage:\n$message";
$headers = "From: noreply@soundharya.info\n"; 
$headers .= "Reply-To: $email_address";   
mail($to,$email_subject,$email_body,$headers);
return true;         
?>

我的实体联系表格

<div class="container">
   <div class="row">
   <h4>Contact</h4>
    <form action="contact_me.php" method="POST" class="col s12">
      <div class="row">
        <div class="input-field col s6">
          <i class="material-icons prefix">account_circle</i>
          <input id="icon_prefix" type="text" class="validate" name="name">
          <label for="icon_prefix">Full Name</label>
        </div>
        <div class="input-field col s6">
          <i class="material-icons prefix">email</i>
          <input id="email" type="email" class="validate">
          <label for="email" data-error="wrong" data-success="right" name="email">Email</label>
        </div>        
      </div>
      <div class="row">
        <div class="input-field col s12">
        <i class="material-icons prefix">message</i>
          <textarea id="textarea1" class="materialize-textarea" name="message"></textarea>
          <label for="textarea1">Message</label>
        </div>
      </div>
    </form>
  </div>
  <div class="container center">
  <input type="submit" value="Send">
  </div>
  </div>

我甚至无法将一条消息发送到我的电子邮件ID。