Attach file to my contact form

I have the following PHP form that works perfectly and I want to add the possibility to attach a file and after 3 weeks of research I still not able to find a way to do.

Please any help will be highly appreciated.

Thanks

HTML CODE:

Code:


<form name="htmlform" method="post" action="MyphpFile.php">
<table width="450px">
</tr>
<tr>
 <td valign="top">
  <label for="first_name"><b>First Name *</b></label>
 </td>
 <td valign="top">
  <input  type="text" name="first_name" maxlength="50" size="30">
 </td>
</tr>

<tr>
 <td valign="top"">
  <label for="last_name"><b>Last Name *</b></label>
 </td>
 <td valign="top">
  <input  type="text" name="last_name" maxlength="50" size="30">
 </td>
</tr>
<tr>
 <td valign="top">
  <label for="email"><b>Email *<font size='2'></b></label>
 </td>
 <td valign="top">
  <input  type="text" name="email" maxlength="80" size="30">
 </td>

</tr>
<tr>
 <td valign="top">
  <label for="comments"><b>Comments*</b></label>
 </td>
 <td valign="top">
  <textarea  name="comments" maxlength="1000" cols="25" rows="6"></textarea>
 </td>

</tr>
<tr>
 <td colspan="4" style="text-align:center">
<br><br>
  <input type="submit" value="Submit">
 </td>
</tr>
</table>
</form>

And here is the code of my PHP File:

PHP Code:


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

    // CHANGE THE TWO LINES BELOW
    $email_to = "myemail@gmail.com";

    $email_subject = "Reporting and issue in UnlimitedWonders";


    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['last_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
    $last_name = $_POST['last_name']; // required
    $email_from = $_POST['email']; // 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)) {
    $error_message .= 'The First Name you entered does not appear to be valid.<br />';
  }
  if(!preg_match($string_exp,$last_name)) {
    $error_message .= 'The Last Name you entered does not appear to be valid.<br />';
  }
  if(strlen($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.\
\
";

    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)."\
";
    $email_message .= "Last Name: ".clean_string($last_name)."\
";
    $email_message .= "Email: ".clean_string($email_from)."\
";
    $email_message .= "Comments: ".clean_string($comments)."\
";


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

<!-- place your own success html below -->

Thank you

<?php
}
die();
?> 

It’s quite a bit more complex than just sending contact info, but there are lots of tutorials online, such as http://www.html-form-guide.com/email-form/php-email-form-attachment.html

There’s an argument for letting people get in contact and then, after you’ve responded via email, you invite them to email you the file. Otherwise, you might get a lot of unwanted file attachments. (Only you know the context of this form, though.)