PHP e-mail attachment script

This simple PHP script or e-mail function is able to send a plain text e-mail message including a single attached file. The file has to be uploaded first or there should be an existing file on your web server. There are better and more advanced PHP scripts on the Internet, but I hope this script will help your to understand how to send e-mail attachment using some short PHP code.

<?php
function mail_attachment($filename, $path, $mailto, $from_mail, $from_name, $replyto, $subject, $message) {
    $file = $path.$filename;
    $file_size = filesize($file);
    $handle = fopen($file, "r");
    $content = fread($handle, $file_size);
    fclose($handle);
    $content = chunk_split(base64_encode($content));
    $uid = md5(uniqid(time()));
    $name = basename($file);
    $header = "From: ".$from_name." <".$from_mail.">\r\n";
    $header .= "Reply-To: ".$replyto."\r\n";
    $header .= "MIME-Version: 1.0\r\n";
    $header .= "Content-Type: multipart/mixed; boundary=\"".$uid."\"\r\n\r\n";
    $header .= "This is a multi-part message in MIME format.\r\n";
    $header .= "--".$uid."\r\n";
    $header .= "Content-type:text/plain; charset=iso-8859-1\r\n";
    $header .= "Content-Transfer-Encoding: 7bit\r\n\r\n";
    $header .= $message."\r\n\r\n";
    $header .= "--".$uid."\r\n";
    $header .= "Content-Type: application/octet-stream; name=\"".$filename."\"\r\n"; // use different content types here
    $header .= "Content-Transfer-Encoding: base64\r\n";
    $header .= "Content-Disposition: attachment; filename=\"".$filename."\"\r\n\r\n";
    $header .= $content."\r\n\r\n";
    $header .= "--".$uid."--";
    if (mail($mailto, $subject, "", $header)) {
        echo "mail send ... OK"; // or use booleans here
    } else {
        echo "mail send ... ERROR!";
    }
}
?>

Next we show an example on how-to use this function to send an e-mail message with one attached zip file:

$my_file = "somefile.zip"; $my_path = $_SERVER['DOCUMENT_ROOT']."/your_path_here/"; $my_name = "Olaf Lederer"; $my_mail = "my@mail.com"; $my_replyto = "my_reply_to@mail.net"; $my_subject = "This is a mail with attachment."; $my_message = "Hallo,\r\ndo you like this script? I hope it will help.\r\n\r\ngr. Olaf"; mail_attachment($my_file, $my_path, "recipient@mail.org", $my_mail, $my_name, $my_replyto, $my_subject, $my_message);