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Predefined PHP Variables

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Author: Admin 01/17/2022
Language: PHP
Tags: php

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Description:

PHP provides a large number of predefined variables to all scripts. The variables represent everything from external variables to built-in environment variables, last error messages to last retrieved headers.

Article:

Table of Contents

• Superglobals — Built-in variables that are always available in all scopes
• $GLOBALS — References all variables available in global scope
• $_SERVER — Server and execution environment information
• $_GET — HTTP GET variables
• $_POST — HTTP POST variables
• $_FILES — HTTP File Upload variables
• $_REQUEST — HTTP Request variables
• $_SESSION — Session variables
• $_ENV — Environment variables
• $_COOKIE — HTTP Cookies
• $php_errormsg — The previous error message
• $http_response_header — HTTP response headers
• $argc — The number of arguments passed to script
• $argv — Array of arguments passed to script

Read more at PHP: Predefined Variables - Manual

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