在PHP中实现数据结构的最佳方法？

Question

I want to use some kind of data structure in PHP (5.2), mainly in order to not pollute the global namespace. I think about two approaches, using an array or a class. Could you tell me which approach is better ?

Also, the main purpose would be for storing configurations constants.

Thanks

$SQL_PARAMETERS = array (
    'server' => '127.0.0.1',
    'login'  => 'root');

class SqlParameters {
    const SERVER = '127.0.0.1';
    const LOGIN  = 'root';
}

echo $SQL_PARAMETERS['server'];
echo SqlParameters::SERVER;

Answer 1

I'd say that class approach is better because you won't overwrite const or the whole class by accident. And you can also extend your class with some methods should you need them later on.

Answer 2

除非您要创建方法和多个实例，否则数组就可以了。

Answer 3

You said you want to avoid polluting your global namespace yet creating an array will do just that: create a global variable that you will be forced to call inside of your classes. This is not best practice and you should strive to avoid global variables at all costs. The class example you posted in your question would be the acceptable solution, also for the reasons that RaYell pointed out.