friendica/include/email.php

<?php

function email_connect($mailbox,$username,$password) {
	if(! function_exists('imap_open'))
		return false;

	$mbox = imap_open($mailbox,$username,$password);

	return $mbox;
}

function email_poll($mbox,$email_addr) {

	if(! ($mbox && $email_addr))
		return array();;

	$search = imap_search($mbox,'FROM "' . $email_addr . '"', SE_UID);
	return (($search) ? $search : array());
}


function construct_mailbox_name($mailacct) {
	$ret = '{' . $mailacct['server'] . (($mailacct['port']) ? ':' . $mailacct['port'] : '');
	$ret .= (($mailacct['ssltype']) ?  '/' . $mailacct['ssltype'] . '/novalidate-cert' : '');
	$ret .= '}' . $mailacct['mailbox'];
	return $ret;
}


function email_msg_meta($mbox,$uid) {
	$ret = (($mbox && $uid) ? imap_fetch_overview($mbox,$uid,FT_UID) : array(array()));
	return ((count($ret)) ? $ret[0] : array());
}


function email_get_msg($mbox,$uid) {
	$ret = array();

	$struc = (($mbox && $uid) ? imap_fetchstructure($mbox,$uid,FT_UID) : null);

	if(! $struc)
		return $ret;

	if(! $struc->parts) {
		$ret['body'] = email_get_part($mbox,$uid,$struc,0);
	}
	else {
		foreach($struc->parts as $ptop => $p) {
			$x = email_get_part($mbox,$uid,$p,$ptop + 1);
			if($x)
				$ret['body'] = $x;
		}
	}
	return $ret;
}

// At the moment - only return plain/text.
// Later we'll repackage inline images as data url's and make the HTML safe

function email_get_part($mbox,$uid,$p,$partno) {
    // $partno = '1', '2', '2.1', '2.1.3', etc for multipart, 0 if simple
    global $htmlmsg,$plainmsg,$charset,$attachments;

	echo $partno;

    // DECODE DATA
    $data = ($partno)
		? imap_fetchbody($mbox,$uid,$partno, FT_UID|FT_PEEK)
        : imap_body($mbox,$uid,FT_UID|FT_PEEK);

    // Any part may be encoded, even plain text messages, so check everything.
    if ($p->encoding==4)
        $data = quoted_printable_decode($data);
    elseif ($p->encoding==3)
        $data = base64_decode($data);

    // PARAMETERS
    // get all parameters, like charset, filenames of attachments, etc.
    $params = array();
    if ($p->parameters)
        foreach ($p->parameters as $x)
            $params[strtolower($x->attribute)] = $x->value;
    if ($p->dparameters)
        foreach ($p->dparameters as $x)
            $params[strtolower($x->attribute)] = $x->value;

    // ATTACHMENT
    // Any part with a filename is an attachment,
    // so an attached text file (type 0) is not mistaken as the message.

    if ($params['filename'] || $params['name']) {
        // filename may be given as 'Filename' or 'Name' or both
        $filename = ($params['filename'])? $params['filename'] : $params['name'];
        // filename may be encoded, so see imap_mime_header_decode()
        $attachments[$filename] = $data;  // this is a problem if two files have same name
    }

    // TEXT
    if ($p->type == 0 && $data) {
        // Messages may be split in different parts because of inline attachments,
        // so append parts together with blank row.
        if (strtolower($p->subtype)=='plain')
            return (trim($data) ."\n\n");
        else
			$data = '';

 //           $htmlmsg .= $data ."<br><br>";
        $charset = $params['charset'];  // assume all parts are same charset
    }

    // EMBEDDED MESSAGE
    // Many bounce notifications embed the original message as type 2,
    // but AOL uses type 1 (multipart), which is not handled here.
    // There are no PHP functions to parse embedded messages,
    // so this just appends the raw source to the main message.
//    elseif ($p->type==2 && $data) {
//        $plainmsg .= $data."\n\n";
//    }

    // SUBPART RECURSION
    if ($p->parts) {
        foreach ($p->parts as $partno0=>$p2) {
            $x =  email_get_part($mbox,$uid,$p2,$partno . '.' . ($partno0+1));  // 1.2, 1.2.1, etc.
			if($x)
				return $x;
		}
    }
}