PHP Learning notes-Super global variables

Source: Internet
Author: User

Super global variable, where is super? There is no limit to the scope of the Super global variable relative to the global type, and the Super global variable can be referenced outside the function, within the function, or any PHP file. There are a lot of super global variables in PHP,

Commonly used are _server GLOBALS _post _get _cookie _session _files

_server is an associative array, and we can output all the key-value of this array with the following code

1 <? PHP 2 3 foreach ($_serveras$key =$value) 4 {56     Echo $key $value . ' <br> '; 7 }89 ?>

Other super global variables only need to have an understanding of what to do with, do not know directly to the official PHP site to check the good.

PHP Learning notes-Super global variables

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