VCardElement::findAttribute

public function findAttribute($name, array $params = null)
{
	if(!isset($this->attributes[$name]) || empty($this->attributes[$name]))
	{
		return null;
	}

	$attrs = $this->attributes[$name];
	if($params === null || empty($params))
	{
		return $attrs[0];
	}

	/**
	* @var $attr VCardElementAttribute
	*/
	foreach($attrs as $attr)
	{
		if($attr->hasParams($params))
		{
			return $attr;
		}
	}

	return null;
}