org\parser\driver\Markdown::_initDetab PHP Метод

    protected function _initDetab()
    {
        #
        # Check for the availability of the function in the `utf8_strlen` property
        # (initially `mb_strlen`). If the function is not available, create a
        # function that will loosely count the number of UTF-8 characters with a
        # regular expression.
        #
        if (function_exists($this->utf8_strlen)) {
            return;
        }
        $this->utf8_strlen = create_function('$text', 'return preg_match_all(
			"/[\\\\x00-\\\\xBF]|[\\\\xC0-\\\\xFF][\\\\x80-\\\\xBF]*/",
			$text, $m);');
    }