imap_mail_compose

<?php

$envelope["from"]="musone@afterfive.com";
$envelope["to"]="musone@darkstar";
$envelope["cc"]="musone@edgeglobal.com";

$part1["type"]=TYPEMULTIPART;
$part1["subtype"]="mixed";

$filename="/tmp/imap.c.gz";
$fp=fopen($filename,"r");
$contents=fread($fp,filesize($filename));
fclose($fp);

$part2["type"]=TYPEAPPLICATION;
$part2["encoding"]=ENCBINARY;
$part2["subtype"]="octet-stream";
$part2["description"]=basename($filename);
$part2["contents.data"]=$contents;

$part3["type"]=TYPETEXT;
$part3["subtype"]="plain";
$part3["description"]="description3";
$part3["contents.data"]="contents.data3\n\n\n\t";

$body[1]=$part1;
$body[2]=$part2;
$body[3]=$part3;

echo nl2br(imap_mail_compose($envelope,$body));

?>