Method replaceTags

/**
 * Replace tags with their values recursively
 *
 * @param   string  $text  The template to process
 * @param   array   $tags  An associative array to replace in the template
 *
 * @return  string  Rendered mail template
 *
 * @since   4.0.0
 */
protected function replaceTags($text, $tags)
{
    foreach ($tags as $key => $value) {
        if (is_array($value)) {
            $matches = array();
            if (preg_match_all('/{' . strtoupper($key) . '}(.*?){\\/' . strtoupper($key) . '}/s', $text, $matches)) {
                foreach ($matches[0] as $i => $match) {
                    $replacement = '';
                    foreach ($value as $subvalue) {
                        if (is_array($subvalue)) {
                            $replacement .= $this->replaceTags($matches[1][$i], $subvalue);
                        }
                    }
                    $text = str_replace($match, $replacement, $text);
                }
            }
        } else {
            $text = str_replace('{' . strtoupper($key) . '}', $value, $text);
        }
    }
    return $text;
}