自定义wordpress php表单不发送

Question

我正在尝试将一个php表单放在wordpress中。由于一些限制，我来到php adn时不是最好的，不幸的是我不能只使用插件。所以我希望你们能帮助我。

截至目前，我可以在静态php页面上发送表单，但是当我将其放入wordpress并测试时，我没有收到电子邮件。这是我的代码

<?php
$action=$_REQUEST['action'];
if ($action==""){    /* display the contact form */        
    ?>
   <form class="w2llead" method="post">
        <input type="hidden" name="action" value="submit">

        <input value="First name" id="sf_first_name" class="w2linput text" name="your-first-name" type="text" placeholder="First name"><br>

        <input value="Last name" id="sf_last_name" class="w2linput text" name="your-last-name" type="text" placeholder="Last Name"><br>

        <input value="Nonprofit" id="sf_company" class="w2linput text" name="your-company" type="text" placeholder="Company"><br>

        <input value="Email Address" id="sf_email" class="w2linput text" name="your-email" type="text" placeholder="Email address"><br>

        <br>
        <textarea id="sf_description" class="w2linput textarea" name="description" placeholder="Enter your questions here &amp; we’ll get  back to you as soon as possible!"></textarea><br>

        <div class="w2lsubmit"><input type="submit" name="w2lsubmit" class="w2linput submit" value="Submit"></div>
    </form>
  <?php
}else{               /* send the submitted data */

  $firstname=$_REQUEST['your-first-name'];
  $lastname=$_REQUEST['your-last-name'];
  $company=$_REQUEST['your-company'];
  $email=$_REQUEST['your-email'];    
  $description=$_REQUEST['description'];

  // prepare email body text
  $Body = "";
  $Body .= "First name: ";
  $Body .= $firstname;
  $Body .= "\n";
  $Body .= "Last name: ";
  $Body .= $lastname;
  $Body .= "\n";
  $Body .= "Company: ";
  $Body .= $company;
  $Body .= "\n";
  $Body .= " Email: ";
  $Body .= $email;
  $Body .= "\n";
  $Body .= "description: ";
  $Body .= $description;
  $Body .= "\n";      

  if (($firstname=="")||($lastname=="")||($company=="")||($email=="")||($description==""))
      {
      echo "All fields are required, please fill <a href=\"\">the form</a> again.";
      }
  else{        
      $from="From: $firstname<$firstname>\r\nReturn-path: $firstname";
      $subject="Still has questions - Nonprofit page";
      mail("thebrandonlewis@gmail.com", $subject, $Body, $from);
      echo "<h3 style='background:#96E1E2;margin: 0 50px;text-align: center;padding:30px 15px;border-radius: 5px;'>Message sent!</h3>";

      }
  }  

＆GT;