codescracker


php

PHP Predefined Variables



« Previous Tutorial Next Tutorial »


There are large number of predefined variables available in PHP.

Basically predefined variables are those variables that are already defined in PHP and have some special meanings, you can not use any predefined variables as your custom variable.

PHP Superglobals

The following table lists the PHP superglobal variables:

Variable Meaning
$GLOBALS This variable contains a reference to every variable, which is currently available within the global scope of script.
$_GET This variable is an associative array of the variables passed to the current script via the HTTP GET method
$_SERVER This variable is an array containing the information such as headers, paths, script locations, etc.
$_FILES This variable is also an associative array of items uploaded to the current script via the HTTP POST method
$_POST This variable is also an associative array of variables passed to the current script via the HTTP POST method
$_COOKIE This is an associative array of variables passed to the current script via the HTTP cookies
$_REQUEST This is an associative array consisting of the contents of $_GET, $_POST, and $_COOKIE
$_PHP_SELF This is a string containing the PHP script file name in which it is called
$php_errormsg This is a variable containing the text of the last error message that generated by the PHP
$_SESSION This is an associative array containing the session variables available to the current script

« Previous Tutorial Next Tutorial »




Tools
Calculator

Quick Links
Signup - Login - Give Online Test