/**
* Checks if query parameters are of a non-UTF-8 encoding and converts the values
* from the specified encoding to UTF-8.
* This method is used to workaround browser/webapp bugs (see #3450). When
* browsers fail to encode query parameters in UTF-8, the tracker will send the
* charset of the page viewed and we can sometimes work around invalid data
* being stored.
*
* @param array $queryParameters Name/value mapping of query parameters.
* @param bool|string $encoding of the HTML page the URL is for. Used to workaround
* browser bugs & mis-coded webapps. See #3450.
*
* @return array
*/
public static function reencodeParameters(&$queryParameters, $encoding = false)
{
if (function_exists('mb_check_encoding')) {
// if query params are encoded w/ non-utf8 characters (due to browser bug or whatever),
// encode to UTF-8.
if (strtolower($encoding) != 'utf-8' && $encoding != false) {
Common::printDebug("Encoding page URL query parameters to {$encoding}.");
$queryParameters = PageUrl::reencodeParametersArray($queryParameters, $encoding);
}
} else {
Common::printDebug("Page charset supplied in tracking request, but mbstring extension is not available.");
}
return $queryParameters;
}
