SuperGlobal variables in PHP

SuperGlobal variables in PHP are the variables that always available regardless of the context.


Example of SuperGlobal variables are:

$_REQUEST it holds data submitted by HTML form

$_GET it holds data submitted by HTML form via GET method

$_POST it holds data submitted by HTML form via POST method

$_FILES it holds data about files submitted via POST method

$_SERVER this SuperGlobal variable contains information about server

$_COOKIE this SuperGlobal variable is used to retrieve cookie information via its name.

$_SESSIOON this SuperGlobal variable is used to set and retrieve session value that is stored in the server.

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