Horde_Imap_Client_Socket::_processCmd PHP Method

    protected function _processCmd($pipeline, $cmd, $data)
    {
        if ($this->_debug->debug && $data instanceof Horde_Imap_Client_Interaction_Command) {
            $data->startTimer();
        }
        foreach ($data as $key => $val) {
            if ($val instanceof Horde_Imap_Client_Interaction_Command_Continuation) {
                $this->_connection->write('', true);
                /* Check for optional continuation responses when the command
                 * has already finished. */
                if (!($cmd_continuation = $this->_processCmdContinuation($pipeline, $val->optional))) {
                    return false;
                }
                $this->_processCmd($pipeline, $cmd, $val->getCommands($cmd_continuation));
                continue;
            }
            if (!is_null($debug_msg = array_shift($cmd->debug))) {
                $this->_debug->client(($cmd == $data ? $cmd->tag . ' ' : '') . $debug_msg);
                $this->_connection->client_debug = false;
            }
            if ($key) {
                $this->_connection->write(' ');
            }
            if ($val instanceof Horde_Imap_Client_Data_Format_List) {
                $this->_connection->write('(');
                $this->_processCmd($pipeline, $cmd, $val);
                $this->_connection->write(')');
            } elseif ($val instanceof Horde_Imap_Client_Data_Format_String && $val->literal()) {
                $c = $this->_capability();
                /* RFC 6855: If UTF8 extension is available, quote short
                 * strings instead of sending as literal. */
                if ($c->isEnabled('UTF8=ACCEPT') && $val->length() < 100) {
                    $val->forceQuoted();
                    $this->_connection->write($val->escape());
                } else {
                    /* RFC 3516/4466: Send literal8 if we have binary data. */
                    if ($cmd->literal8 && $val->binary() && ($c->query('BINARY') || $c->isEnabled('UTF8=ACCEPT'))) {
                        $binary = true;
                        $this->_connection->write('~');
                    } else {
                        $binary = false;
                    }
                    $literal_len = $val->length();
                    $this->_connection->write('{' . $literal_len);
                    /* RFC 2088 - If LITERAL+ is available, saves a roundtrip
                     * from the server. */
                    if ($cmd->literalplus && $c->query('LITERAL+')) {
                        $this->_connection->write('+}', true);
                    } else {
                        $this->_connection->write('}', true);
                        $this->_processCmdContinuation($pipeline);
                    }
                    if ($debug_msg) {
                        $this->_connection->client_debug = false;
                    }
                    $this->_connection->writeLiteral($val->getStream(), $literal_len, $binary);
                }
            } else {
                $this->_connection->write($val->escape());
            }
        }
        return true;
    }