What are global variable in php ?

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Sourav Bhattacharya

Excel VBA Expert

A variable declared outside a function is global
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Digital Marketing Trainer with 9 years of experience

Global Variable we can declare the outside the function and another page .The PHP super global variables are: $GLOBALS $_SERVER $_REQUEST $_POST $_GET $_FILES $_ENV $_COOKIE $_SESSION
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IT Professional Trainer with 15 years of experience in IT Industry

Global variables are set by a PHP script author to assure that a variable and its value will be available inside of a function, or when another PHP file is called to manipulate that variable. When you create custom variables in the normal fashion those variables and their values will not be available...
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Global variables are set by a PHP script author to assure that a variable and its value will be available inside of a function, or when another PHP file is called to manipulate that variable. When you create custom variables in the normal fashion those variables and their values will not be available to you inside of a function or an externally called file. To make sure they are available you create the variable in the normal way and then apply the following code to make global and available to cover more scope only when needed. read less
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Senior .NET Trainer | 10+ Years Teaching | Real-Time Project & Interview Focus

Global Variables are super globals. which means you can acces from any function , file and class
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Global variables are shared across application by defining global.
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Java Trainer Bhopal

Request, get, post, session are global variable in php.
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All in one training institute

The PHP superglobal variables are: $GLOBALS $_SERVER $_REQUEST $_POST $_GET $_FILES $_ENV $_COOKIE $_SESSION
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1536578

If we declare global variable we can access anywhere inside functions. Global variable is a public variable and have global scope inside functions.
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1536578

Learn php through pratice and trail and error method. Please go for online tutorials. It is the best method of learning things
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A Day Dreamer!

As the name specifies, Global variables are the variables, which is recognized throughout & can be accessed from any place. Some of them in php are $_POST,$_SESSION
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