$ _ POST and $ _ GET are redundant?

Is $ _ POST and $ _ GET redundant? PHP seems to be able to automatically obtain the data of the post or get request, and does not need to use the $ _ POST or $ _ GET array. Example: & lt ;? $ UserName = $ _ POST ["userName"]; $ PS = $ _ POST ["PS"]; echo & nbsp; "is the user $ _ POST and $ _ GET redundant?
PHP seems to be able to automatically obtain the data of the post or get request. it does not need to be obtained using the $ _ POST or $ _ GET array. For example:
$ UserName = $ _ POST ["userName"];
$ PS = $ _ POST ["PS"];
Echo "the user name you entered is:". $ userName;
Echo"
The password you entered is: ". $ PS;
?>
Even if you can still GET the form data after removing the $ _ POST lines in the code, do I think $ _ POST and $ _ GET are redundant, in addition, I think this is the biggest difference between PHP and ASP. ASP cannot obtain any of the following information without using the request set:
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That's because you enabled register_globals. But register_globals is safe only when it is turned off. it is not good for you to write code like this.
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Which website has your register_globals enabled?

I have prepared a text.
Xxx. php? UserName = abc & PS = 1
Xxx. php? UserName = abc & PS = 2
Xxx. php? UserName = abc & PS = 3
......
Xxx. php? UserName = abc & PS = 999999

This is much more convenient than getting 999999 posts, although post is not difficult.
It would be more fun if you post and upload something.