public function get_extension()
	{
		if ($this->link !== null)
		{
			$url = SimplePie_Misc::parse_url($this->link);
			if ($url['path'] !== '')
			{
				return pathinfo($url['path'], PATHINFO_EXTENSION);
			}
		}
		return null;
	}
public function get_extension()
	{
		if ($this->link !== null)
		{
			$url = SimplePie_Misc::parse_url($this->link);
			if ($url['path'] !== '')
			{
				return pathinfo($url['path'], PATHINFO_EXTENSION);
			}
		}
		return null;
	}
public function get_extension ( ) { if ( $ this -> link !== null ) { $ url = SimplePie_Misc :: parse_url ( $ this -> link ) ; if ( $ url [ 'path' ] !== '' ) { return pathinfo ( $ url [ 'path' ] , PATHINFO_EXTENSION ) ; } } return null ; }
Get the file extension

@return string|null
Get the file extension