<?php
class mailbox {
	var $mailbox;
	var $user;
	var $password;
	var $host;
	var $protocol;
	var $port;
	var $serverstring;
	var $folderinfo;
	
	function mailbox($host, $protocol, $port, $user, $password){
		$this->host = $host;
		$this->protocol = $protocol;
		$this->port = $port;
		$this->user = $user;
		$this->password = $password;
		$this->mailbox = $this->open();
	}
	
	function open(){
		$this->serverstring = "{".$this->host.":".$this->port."}";
		return imap_open($this->serverstring, $this->user, $this->password);
	}
	
	function close(){
		imap_close($this->mailbox);
	}
	
	function set_folderinfo() {
		unset($this->folderinfo);
        $this->folderinfo = array();
        $boxes = imap_getmailboxes($this->mailbox, $this->serverstring, "*");
		if (is_array($boxes)) {
            foreach ($boxes as $box) {
				$box->name = str_replace($this->serverstring, "", $box->name);
                if (!empty($box->name) && !empty($box->delimiter)) {
                    if ($box->name && !isset($unique[$box->name])) {
                        $this->folderinfo[$box->name] = $box;
                    }
                }
            }
        }
    }
	
	function get_foldernames(){
		foreach ($this->folderinfo as $key => $value) {
			echo "Schlüssel: $key;
\n";
		}
	}

}
?>

$mailbox = new mailbox($cfg_mailserver, $cfg_mailprotocol, $cfg_mailport, "username@imapserver.tld", "mailpasswort");
$mailbox->set_folderinfo();
$mailbox->get_foldernames();