PHPHtmlParser\Selector::match PHP Метод

    protected function match($operator, $pattern, $value)
    {
        $value = strtolower($value);
        $pattern = strtolower($pattern);
        switch ($operator) {
            case '=':
                return $value === $pattern;
            case '!=':
                return $value !== $pattern;
            case '^=':
                return preg_match('/^' . preg_quote($pattern, '/') . '/', $value);
            case '$=':
                return preg_match('/' . preg_quote($pattern, '/') . '$/', $value);
            case '*=':
                if ($pattern[0] == '/') {
                    return preg_match($pattern, $value);
                }
                return preg_match("/" . $pattern . "/i", $value);
        }
        return false;
    }