src/Riak/Api/Http.php
protected function prepareRequestParameters()
    {
        if ($this->command->hasParameters()) {
            // build query using RFC 3986 (spaces become %20 instead of '+')
            $this->query = http_build_query($this->command->getParameters(), '', '&', PHP_QUERY_RFC3986);
        }

        return $this;
    }
protected function prepareRequestParameters()
    {
        if ($this->command->hasParameters()) {
            // build query using RFC 3986 (spaces become %20 instead of '+')
            $this->query = http_build_query($this->command->getParameters(), '', '&', PHP_QUERY_RFC3986);
        }

        return $this;
    }
Prepare request parameters

@return $this