Request Prefixing constants

[markwalet]

It seems like a good idea to define the constants in a namespace. This is generally seen as a good practice.

Something like the following would be nice:

class Token {

    const METHOD_UNIQUE = 'Unique';
    const METHOD_UNIQUE_STRING = 'UniqueString';
    const METHOD_UNIQUE_NUMBER = 'UniqueNumber';

    // ...
}

You can call this like the following:

switch ($this->DT_settings['type']) {
    case Token::METHOD_UNIQUE:
        $generated_token = $token->unique($table, $this->DT_Column, $this->DT_settings['size'], $this->DT_settings['special_chr']);

        break;
    case Token::METHOD_UNIQUE_NUMBER:
        $generated_token = $token->uniqueNumber($table, $this->DT_Column, $this->DT_settings['size'], $this->DT_settings['special_chr']);

        break;
}

This makes more sense than defining global constants and prefixing them with a abbreviation of the package name.

For backward compatibility you could leave the constants in (but deprecated) for this version. On the next main version you can delete those constants permanently.