DmitryDulepov\Realurl\Configuration\ConfigurationReader::updateConfigurationForEncoding PHP Method

    protected function updateConfigurationForEncoding(&$configurationKey)
    {
        if (isset($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl']['_DOMAINS']['encode'])) {
            foreach ($GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl']['_DOMAINS']['encode'] as $encodeConfiguration) {
                if (isset($encodeConfiguration['rootpage_id']) && (int) $encodeConfiguration['rootpage_id'] !== (int) $this->configuration['pagePath']['rootpage_id']) {
                    // Not applicable to this root page
                    continue;
                }
                if (isset($encodeConfiguration['ifDifferentToCurrent']) && $encodeConfiguration['ifDifferentToCurrent'] && GeneralUtility::_GET($encodeConfiguration['GETvar']) == $encodeConfiguration['value']) {
                    // Same as current but prohibited by 'ifDifferentToCurrent'
                    continue;
                }
                $getVarName = $encodeConfiguration['GETvar'];
                if (!isset($this->urlParameters[$getVarName]) || $this->urlParameters[$getVarName] != $encodeConfiguration['value']) {
                    // Not that GET variable value
                    continue;
                }
                if (isset($encodeConfiguration['useConfiguration']) && $encodeConfiguration['useConfiguration'] !== $configurationKey) {
                    // Use different config
                    $configurationKey = $this->resolveConfigurationKey($encodeConfiguration['useConfiguration']);
                    $this->configuration = $GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['realurl'][$configurationKey];
                }
                $this->domainConfiguration = $encodeConfiguration;
                break;
            }
        }
    }