Superglobal (PHP)

In PHP, a superglobal is a built-in variable that always available in all scopes.

Description

Several predefined variables in PHP are "superglobals", which means they are available in all scopes throughout a script.

There is no need to do global $variable; to access them within functions or methods.

These superglobal variables are:

• $GLOBALS
• $_SERVER
• $_GET
• $_POST
• $_FILES
• $_COOKIE
• $_SESSION
• $_REQUEST
• $_ENV

See also

• Array (PHP)
• PHP

External links

• http://php.net/manual/en/language.variables.superglobals.php
• http://www.w3schools.com/php/php_superglobals.asp
• http://www.sitepoint.com/introducin-superglobals/
• http://www.hackingwithphp.com/3/8/0/superglobals
• http://stackoverflow.com/questions/834491/create-superglobal-variables-in-php
• http://www.programminghelp.com/php/php-superglobals/
• http://www.phpforkids.com/php/php-forms-predefined-variables-superglobals.php
• http://www.imperva.com/docs/hii_php_superglobals_supersized_trouble.pdf

Custom superglobals:

• http://stackoverflow.com/questions/8413937/custom-super-global-in-php
• http://stackoverflow.com/questions/18004129/defining-custom-superglobal-array-in-php