PHP Super Global variables

$_get: Get value on Address bar

$_post:post form sending data

$_request: There is a get and post content

If the post and get names are the same: then it is up to the setup item, such as request_crder= "GP", which is to store get again post if duplicate name get overwrites post

The sequencing can be set in php.ini: request_crder= "GP";

$_ENV: Environment variables for server operating systems such as operating system type Linux win MAC environment variables, etc.

This thing designed system security issues to be set disable php.ini find varables_order= "egpcs" Remove E on the line

$_server: Web content such as header information path script location

$_globals: is an alias to the global variable roster, through which the global variable can be accessed arbitrarily $a =3 so B; $b =4 function t () {print (globals) all variables print globals[a]=99 so a=99. }

$_session: Create a unique ID for each visitor the Session_Start () function must precede the

<?php session_start ();?>
$_cookie:cookie are often used to identify users. A cookie is a small file that the server leaves on the user's computer. Whenever the same computer requests a page through a browser, it also sends a cookie. With PHP, you can create and retrieve the value of the cookie before you put it in the HTML tag
$_files: When the client commits, we get a $_files array
PHP Super Global variables