PHP 电子邮件脚本总是通过电子邮件加上语法错误

为什么无论您是否输入验证码，我的联系页面都不会通过电子邮件发送表单中的详细信息。如果您错误地结束验证码，则会显示错误消息，但电子邮件仍然发送？我已经困在这个上面好几天了。

PHP 语法检查器说这个代码块有错误：

<?php
if(isset($_POST['email'])) {
    // EDIT THE 2 LINES BELOW AS REQUIRED
    $email_to = "myemail@hotmail.co.uk";
    $email_subject = "Your email subject line";

    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['name']) ||
        !isset($_POST['email']) ||
        !isset($_POST['phone']) ||
        !isset($_POST['msg'])) {
        died('We are sorry, but there appears to be a problem with the form you submitted.');      
    }
    $name = $_POST['name']; // required
    $email = $_POST['email']; // required
    $phone = $_POST['phone']; // not required
    $msg = $_POST['msg']; // required
    $error_message = "";
    $email_exp = '/^[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+'.[A-Za-z]{2,4}$/';
  if(!preg_match($email_exp,$email)) {
    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
  }
    $string_exp = "/^[A-Za-z .'-]+$/";
  if(!preg_match($string_exp,$name)) {
    $error_message .= 'The Name you entered does not appear to be valid.<br />';
  }
  if(strlen($msg) < 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);
    }
    $email_message .= "Name: ".clean_string($name)."'n";
    $email_message .= "Email: ".clean_string($email)."'n";
    $email_message .= "Phone: ".clean_string($phone)."'n";
    $email_message .= "Message: ".clean_string($msg)."'n";

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

它说最后一行是问题?>

解析错误：语法错误，第 65 行代码中的意外$end错误 解析代码