Copyright::getLicenceUrl

public function getLicenceUrl()
{
	static $urls = [
		self::LICENCE_MIT => "https://opensource.org/licenses/MIT",
		self::LICENCE_BSD2 => "https://opensource.org/licenses/BSD-2-Clause",
		self::LICENCE_BSD3 => "https://opensource.org/licenses/BSD-3-Clause",
		self::LICENCE_APACHE2 => "http://www.apache.org/licenses/LICENSE-2.0",
		self::LICENCE_W3C => "https://www.w3.org/Consortium/Legal/2015/copyright-software-and-document",
		self::LICENCE_OFL => "https://scripts.sil.org/OFL",
		self::LICENCE_LGPL2 => "https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html",
	];

	if($this->licenceUrl === null && isset($urls[$this->licence]))
	{
		return $urls[$this->licence];
	}

	return $this->licenceUrl;
}