<form name="contactform" method="post" action="send.php"  enctype="multipart/form-data">
                    <ul class="formmail">
                        <li>
                            <label for="first_name">Name</label>
                            <input name="first_name" type="text" required>
                        </li>
                        <li>
                            <label for="email">E-mail</label>
                            <input name="email" type="text" required>
                        </li>
                        <li>
                            <label for="telephone">Phone number</label>
                            <input name="telephone" type="text" required>
                        </li>
                        <li>
                            <label for="comments">Comment</label>
                            <textarea name="comments" rows="14" required></textarea>
                        </li>
           <li>
               
                 <input type="file" name="file1" id="file1">
            </li>
                    </ul>
                    <div class="btn_area">
                        <input name="재설정" type="reset" value="다시 작성하기" class="btn_submit2">
                        <input type="submit" value="문의하기 보내기" class="btn_submit">
                    </div>
            </form>

<meta charset="utf-8">
<?php
if(isset($_POST['email'])) {

    $email_to = "*** 개인정보보호를 위한 이메일주소 노출방지 ***";
    $email_subject = "문의사항입니다.";   //   메일 제목
    $email_subject = '=?UTF-8?B?'.base64_encode($email_subject).'?=';

    function died($error) {
        // your error code can go here
        echo "<script> alert('문의접수가 실패하였습니다. 해당란을 형식에 맞게 입력해주세요');";
        echo "history.go(-1);";
        echo "</script>";
        die();
    }
    // validation expected data exists
    if(!isset($_POST['first_name']) ||
        !isset($_POST['email']) ||
        !isset($_POST['telephone']) ||
        !isset($_POST['comments'])) {
        died('We are sorry, but there appears to be a problem with the form you submitted.');
    }
      // 첨부파일
      function attach_file($upfile, $file) {
        $fp = @fopen($file, "r");
        $tmpfile = array( "name" => $upfile, "data" => @fread($fp, @filesize($file)));
        @fclose($fp);
        return $tmpfile;
        }
    $first_name = $_POST['first_name']; // required
    $email_from = $_POST['email']; // required
    $telephone = $_POST['telephone']; // 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)) {
    $error_message .= 'The Email Address you entered does not appear to be valid.<br />';
  }
  if(strlen($comments) < 2) {
    $error_message .= 'The Comments you entered do not appear to be valid.<br />';
  }
  if(strlen($error_message) > 0) {
    died($error_message);
  }
    $email_message = "";
    function clean_string($string) {
      $bad = array("content-type","bcc:","to:","cc:","href");
      return str_replace($bad,"",$string);
    }
    $email_message .= "이름 : ".clean_string($first_name)."\n\n";
    $email_message .= "이메일 : ".clean_string($email_from)."\n\n";
    $email_message .= "연락처 : ".clean_string($telephone)."\n\n";
    $email_message .= "문의사항 : ".clean_string($comments)."\n\n";

// create email headers
$headers = 'From: '.$email_from;
// 제목이 깨질경우 아래 캐릭터셋 적용
@mail($email_to, $email_subject, $email_message, $headers);
?>
<!-- include your own success html here -->
<script>
alert ("문의접수가 완료되었습니다.\n빠른 시일안에 답변드리겠습니다.");
location.href='/homepage/content/formmail.php';
</script>
<?php
}
?>