Test if string is URL encoded in PHP

Question

How can I test if a string is URL encoded?

Which of the following approaches is better?

• Search the string for characters which would be encoded, which

Answer 1

private static boolean isEncodedText(String val, String... encoding) throws UnsupportedEncodingException { String decodedText = URLDecoder.decode(val, TransformFetchConstants.DEFAULT_CHARSET);

    if(encoding != null && encoding.length > 0){
        decodedText = URLDecoder.decode(val, encoding[0]);
    }

    String encodedText =  URLEncoder.encode(decodedText);

    return encodedText.equalsIgnoreCase(val) || !decodedText.equalsIgnoreCase(val);

}