public function getQueryParameter($name)
    {
        return isset($this->query[$name]) ? $this->query[$name] : null;
    }
public function getQueryParameter($name)
    {
        return isset($this->query[$name]) ? $this->query[$name] : null;
    }
public function getQueryParameter ( $ name ) { return isset ( $ this -> query [ $ name ] ) ? $ this -> query [ $ name ] : null ; }
Retrieve the value of a query parameter.

@param string $name The name of the query parameter.

@return string|null
Retrieve the value of a query parameter .