Mail::trackClick

public function trackClick($matches)
{
	$href = $matches[3];
	if ($href == "")
	{
		return $matches[0];
	}

	if(mb_substr($href, 0, 2) == '//')
	{
		$href = $this->trackLinkProtocol . ':' . $href;
	}

	if(mb_substr($href, 0, 1) == '/')
	{
		$href = $this->trackLinkProtocol . '://' . $this->settingServerName . $href;
	}

	if($this->trackClickLink)
	{
		if($this->trackClickUrlParams)
		{
			$hrefAddParam = '';
			foreach($this->trackClickUrlParams as $k => $v)
				$hrefAddParam .= '&'.htmlspecialcharsbx($k).'='.htmlspecialcharsbx($v);

			$parsedHref = explode("#", $href);
			$parsedHref[0] .= (strpos($parsedHref[0], '?') === false? '?' : '&').mb_substr($hrefAddParam, 1);
			$href = implode("#", $parsedHref);
		}

		$href = $this->trackClickLink . '&url=' . urlencode($href) . '&sign=' . urlencode(Tracking::getSign($href));
		if (!preg_match('/^http://|https:///', $this->trackClickLink))
		{
			$href = $this->trackLinkProtocol . '://' . $this->settingServerName . $href;
		}
	}

	return $matches[1].$matches[2].$href.$matches[4].$matches[5];
}