带附件的PHP邮件

Hello i'm trying to send email from form^) Here is my code

<?php
$to = "some email";
$from = "site";
$subject = "Resume";
$boundary = "---";

if (isset($_POST['ok'])){
    $filename = $_POST['fileField'];
    $resumeLink = $_POST['linkField'];
    $message = "Attachment: " .$resumeLink;
    /* Headers*/
    $headers = "From: $from
Reply-To: $from
";
    $headers .= "Content-Type: multipart/mixed; boundary=\"$boundary\"";
    $body = "--$boundary
";  
    /* Add message */
    $body .= "Content-type: text/html; charset='utf-8'
";
    $body .= "Content-Transfer-Encoding: quoted-printablenn";
    $body .= "Content-Disposition: attachment; filename==?utf-8?B?".base64_encode($filename)."?=

";
    $body .= $message."
";
    $body .= "--$boundary
";
    $file = fopen($filename, "r"); //open file
    $text = fread($file, filesize($filename)); //read file
    fclose($file); //close file
    /* Add message type */
    $body .= "Content-Type: application/octet-stream; name==?utf-8?B?".base64_encode($filename)."?=
"; 
    $body .= "Content-Transfer-Encoding: base64
";
    $body .= "Content-Disposition: attachment; filename==?utf-8?B?".base64_encode($filename)."?=

";
    $body .= chunk_split(base64_encode($text))."
";
    $body .= "--".$boundary ."--
";
    if(mail($to, $subject, $body, $headers)){header("Location: /");}

}
?>

Attachment will send, but it size will be 1 byte without any content inside. Whats wrong?

It's hard to tell exactly, but you've added header fields into mail body, you should add them in headers