Horde\ManageSieve::connect PHP Méthode

    public function connect($host = null, $port = null, $context = null, $secure = null)
    {
        if (isset($host)) {
            $this->_params['host'] = $host;
        }
        if (isset($port)) {
            $this->_params['port'] = $port;
        }
        if (isset($context)) {
            $this->_params['context'] = array_merge_recursive($this->_params['context'], $context);
        }
        if (isset($secure)) {
            $this->_params['secure'] = $secure;
        }
        if (self::STATE_DISCONNECTED != $this->_state) {
            throw new Exception\NotDisconnected();
        }
        try {
            $this->_sock = new Client($this->_params['host'], $this->_params['port'], $this->_params['timeout'], $this->_params['secure'], $this->_params['context']);
        } catch (Client\Exception $e) {
            throw new Exception\ConnectionFailed($e);
        }
        if ($this->_params['bypassauth']) {
            $this->_state = self::STATE_AUTHENTICATED;
        } else {
            $this->_state = self::STATE_NON_AUTHENTICATED;
            $this->_doCmd();
        }
        // Explicitly ask for the capabilities in case the connection is
        // picked up from an existing connection.
        try {
            $this->_cmdCapability();
        } catch (Exception $e) {
            throw new Exception\ConnectionFailed($e);
        }
        // Check if we can enable TLS via STARTTLS.
        if ($this->_params['secure'] === 'tls' || $this->_params['secure'] === true && !empty($this->_capability['starttls'])) {
            $this->_doCmd('STARTTLS');
            if (!$this->_sock->startTls()) {
                throw new Exception('Failed to establish TLS connection');
            }
            // The server should be sending a CAPABILITY response after
            // negotiating TLS. Read it, and ignore if it doesn't.
            // Unfortunately old Cyrus versions are broken and don't send a
            // CAPABILITY response, thus we would wait here forever. Parse the
            // Cyrus version and work around this broken behavior.
            if (!preg_match('/^CYRUS TIMSIEVED V([0-9.]+)/', $this->_capability['implementation'], $matches) || version_compare($matches[1], '2.3.10', '>=')) {
                $this->_doCmd();
            }
            // Query the server capabilities again now that we are under
            // encryption.
            try {
                $this->_cmdCapability();
            } catch (Exception $e) {
                throw new Exception\ConnectionFailed($e);
            }
        }
    }

 public function testDisconnect()
 {
     $this->fixture->connect($this->config['host'], $this->config['port']);
     $this->fixture->login($this->config['username'], $this->config['password']);
     $this->fixture->disconnect();
 }