Question

I have this code

$arr['... key'] = 'value';

this works and not return error, but I interest, how much justified is array keys, like this '... key' ? (here, after points, is space also). possible obtain some problems, due these keys ?

Answer 1

There’s no reason you can’t use whatever string you want as a key name. It won’t cause any errors or other problems. Weird keys might be hard for you to remember or keep track of, and it’s probably not a good idea to use them design-wise, but PHP doesn’t care.