PHP表单数据发送到电子邮件

Question

我想将html表单数据发送到我的电子邮箱。但点击按钮后，数据不会发送到我的代码中指定的电子邮件ID。你能帮助我吗？这段代码有什么问题？

<?php
if(isset($_POST['email'])) {

// EDIT THE 2 LINES BELOW AS REQUIRED
$email_to = "sharayukulkarni18@gmail.com";
$email_subject = "Hello";

function died($error) {
    // your error code can go here
    echo "We are very sorry, but there were error(s) found with the form you 
submitted. ";
    echo "These errors appear below.<br /><br />";
    echo $error."<br /><br />";
    echo "Please go back and fix these errors.<br /><br />";
    die();
}


// validation expected data exists
if(!isset($_POST['first_name']) ||

    !isset($_POST['email']) ||

    !isset($_POST['comments'])) {
    died('We are sorry, but there appears to be a problem with the form you 
submitted.');       
}



$first_name = $_POST['first_name']; // required
// required
$email_from = $_POST['email']; // required
// not required
$comments = $_POST['comments']; // required

    $error_message = "";
    $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}$/';

  if(!preg_match($email_exp,$email_from)) {
    $error_message .= 'The Email Address you entered does not appear to be 
 valid.<br />';
  }

    $string_exp = "/^[A-Za-z .'-]+$/";

  if(!preg_match($string_exp,$first_name)) {
    $error_message .= 'The First Name you entered does not appear to be 
  valid.
 <br />';
  }



 if(strlen($comments) < 2) {
$error_message .= 'The Comments you entered do not appear to be valid.<br 
/>';
  }

  if(strlen($error_message) > 0) {
    died($error_message);
  }

$email_message = "Form details below.\n\n";


function clean_string($string) {
  $bad = array("content-type","bcc:","to:","cc:","href");
  return str_replace($bad,"",$string);
}



$email_message .= "First Name: ".clean_string($first_name)."\n";

$email_message .= "Email: ".clean_string($email_from)."\n";

$email_message .= "Comments: ".clean_string($comments)."\n";

// create email headers
$headers = 'From: '.$email_from."\r\n".
'Reply-To: '.$email_from."\r\n" .
'X-Mailer: PHP/' . phpversion();
@mail($email_to, $email_subject, $email_message, $headers);  
?>

这是Html表单代码：我使用了post方法，以及名为action =“。php”的文件。但仍然没有数据发送到我的电子邮件ID。

    <div class="col-md-6 c-footer-4-p-left">
        <div class="c-feedback">
          <h3 class="c-font-thin">Enquiry</h3>
         <form  method="post" action="send_form_email.php">
        <input type="text" placeholder="Your Name" class="form-control" 
  name="first_name">
                                <input type="text" placeholder="Your Email" 
  class="form-control" name="email">
                                <textarea rows="8" name="comments" 
   placeholder="Write comment here ..." class="form-control"></textarea>
                                <button type="submit" value="Submit" 
   class="btn c-btn-white c-btn-border-2x c-btn-uppercase btn-lg c-btn-bold 
   c-btn-square">Send</button>
                            </form>
                        </div>
                    </div>