Cake\Upgrade\Shell\Task\I18nTask::_adjustI18n PHP Method

    protected function _adjustI18n($contents)
    {
        // Basic functions
        $pattern = '#__(n|c)?\\((\'|")(.*?)(?<!\\\\)\\2,#';
        $replacement = function ($matches) {
            $string = $matches[3];
            $count = 0;
            $c = 1;
            while ($c) {
                $repString = '{' . $count . '}';
                $string = preg_replace('/%[sdefc]/', $repString, $string, 1, $c);
                $count++;
            }
            return '__' . $matches[1] . '(' . $matches[2] . $string . $matches[2] . ',';
        };
        $contents = preg_replace_callback($pattern, $replacement, $contents, -1, $count);
        // Domain functions
        $pattern = '#__(|d|dc|dn|dcn)?\\((\'|")(.*?)(?<!\\\\)\\2,\\s*(\'|")(.*?)(?<!\\\\)\\4,#';
        $replacement = function ($matches) {
            $string = $matches[5];
            $count = 0;
            $c = 1;
            while ($c) {
                $repString = '{' . $count . '}';
                $string = preg_replace('/%[sdefc]/', $repString, $string, 1, $c);
                $count++;
            }
            return '__' . $matches[1] . '(' . $matches[2] . $matches[3] . $matches[2] . ', ' . $matches[4] . $string . $matches[4] . ',';
        };
        $contents = preg_replace_callback($pattern, $replacement, $contents, -1, $count);
        return $contents;
    }