chamilo / chamilo-lms

            array_shift($labels);

        }

        // render extra labels, if any

        if (is_array($labels)) {

            foreach ($labels as $key => $text) {

                $key     = is_int($key)? $key + 2: $key;

                $strHtml = str_replace("{label_{$key}}", $text, $strHtml);

                $strHtml = str_replace("<!-- BEGIN label_{$key} -->", '', $strHtml);

                $strHtml = str_replace("<!-- END label_{$key} -->", '', $strHtml);

            }

        }

        // clean up useless label tags

        if (strpos($strHtml, '{label_')) {

            $html = str_replace('{error_class}', '', $html);

            $html = preg_replace("/([ \t\n\r]*)?<!-- BEGIN error -->.*<!-- END error -->([ \t\n\r]*)?/isU", '', $html);

        }

        if (is_array($label)) {

            foreach ($label as $key => $text) {

                $key  = is_int($key)? $key + 2: $key;

                $html = str_replace("{label_{$key}}", $text, $html);

                $html = str_replace("<!-- BEGIN label_{$key} -->", '', $html);

                $html = str_replace("<!-- END label_{$key} -->", '', $html);

            }

        }

        if (strpos($html, '{label_')) {

            $html = preg_replace('/\s*<!-- BEGIN label_(\S+) -->.*<!-- END label_\1 -->\s*/is', '', $html);

        }