Predis\Connection\Parameters::parse PHP Method

    public static function parse($uri)
    {
        if (stripos($uri, 'unix://') === 0) {
            // parse_url() can parse unix:/path/to/sock so we do not need the
            // unix:///path/to/sock hack, we will support it anyway until 2.0.
            $uri = str_ireplace('unix://', 'unix:', $uri);
        }
        if (!($parsed = parse_url($uri))) {
            throw new \InvalidArgumentException("Invalid parameters URI: {$uri}");
        }
        if (isset($parsed['host']) && false !== strpos($parsed['host'], '[') && false !== strpos($parsed['host'], ']')) {
            $parsed['host'] = substr($parsed['host'], 1, -1);
        }
        if (isset($parsed['query'])) {
            parse_str($parsed['query'], $queryarray);
            unset($parsed['query']);
            $parsed = array_merge($parsed, $queryarray);
        }
        if (stripos($uri, 'redis') === 0) {
            if (isset($parsed['pass'])) {
                $parsed['password'] = $parsed['pass'];
                unset($parsed['pass']);
            }
            if (isset($parsed['path']) && preg_match('/^\\/(\\d+)(\\/.*)?/', $parsed['path'], $path)) {
                $parsed['database'] = $path[1];
                if (isset($path[2])) {
                    $parsed['path'] = $path[2];
                } else {
                    unset($parsed['path']);
                }
            }
        }
        return $parsed;
    }

    /**
     * {@inheritdoc}
     */
    public function register(Container $app)
    {
        $prefix = $this->prefix;

        $app["$prefix.default_parameters"] = array();
        $app["$prefix.default_options"] = array();

        $app["$prefix.uri_parser"] = $app->protect(function ($uri) {
            return Parameters::parse($uri);
        });

        $app["$prefix.client_constructor"] = $app->protect(function ($parameters, $options) {
            return new Client($parameters, $options);
        });

        $app["$prefix.client_initializer"] = $this->getClientInitializer($app, $prefix);
        $app["$prefix"] = $this->getProviderHandler($app, $prefix);
    }