Name function description $ _ GET [] GET the variable array submitted by the GET method $ _ POST [] GET the variable array submitted by the POST method $ _ COOKIE [] GET and set the current website cookie identifier $ _ SESSION [] to obtain the unique identifier of the current user's access, represented in arrays, such as SESSIONID and Custom SESSION Data $ _ ENV [] name
$ _ GET [] GET the variable array submitted in the GET method
$ _ POST [] get the variable array submitted in the POST method
$ _ COOKIE [] get and set the cookie ID of the current website
$ _ SESSION [] gets the unique identifier of the current user's access, represented in arrays, such as SESSIONID and custom SESSION data.
$ _ ENV [] Current PHP environment variable array
$ _ SERVER [] Current php server variable array
$ _ FILES [] parameter values submitted to the current script during file upload, in array format
$ _ REQUEST [] contains all the requests submitted by the current script, including $ _ GET, $ _ POST, $ _ COOKIE, and $ _ SESSION.
$ GLOBALS [] this super variable array contains references to all Super global variables in the script being executed