AccountFacebook::mergeUrlParams

protected function mergeUrlParams(array $currentParams, array $newParams)
{
	foreach($newParams as $name => $value)
	{
		if(empty($value))
		{
			if(isset($currentParams[$name]))
			{
				unset($currentParams[$name]);
			}
		}
		else
		{
			$currentParams[$name] = $value;
		}
	}

	return $currentParams;
}