Jan 3, 2015 · I was looking for examples of using global variables in IF statements, found few but I still cannot make my code to work. I'm declaring variable globally and tried to assign values inside if statement and later to check if the variable contains certain value.

PHP Global Variables - Superglobals. Some predefined variables in PHP are "superglobals", which means that they are always accessible, regardless of scope - and you can access them from any function, class or file without having to do anything special. The PHP superglobal variables are: $GLOBALS $_SERVER $_REQUEST $_POST $_GET $_FILES $_ENV ...

Jun 29, 2021 · Below is the list of superglobal variables available in PHP: $GLOBALS $_SERVER $_REQUEST $_GET $_POST $_SESSION $_COOKIE $_FILES $_ENV; Let us now learn about some of these superglobals in detail: $GLOBALS: It is a superglobal variable which is used to access global variables from anywhere in the PHP script. PHP stores all the global variables ...

Nov 23, 2012 · You can declare global variables as static attributes: class global { static $foo = "bar"; } And you can use and modify it every where you like, like: function echoFoo() { echo global::$foo; }

Jun 30, 2011 · If you set a value in the 'if' clause, then the 'else' clause will not be executed, and vice versa. So, you could only get to the 'else' clause on a second iteration of the statement. Then you need to understand where variables are defined, and when they become undefined.

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

Jun 11, 2019 · PHP have Predefined “Super Global” variables for some specific purpose. Below list shows PHP superglobal variables- PHP $GLOBALS Variable is used to access the variable from anywhere in the PHP Script. You have to use the GLOBALS keyword before the variable.

PHP stores all global variables in an array called $GLOBALS ["your_index"]. The index holds the name of the variable. The example below shows how to use the super global variable $GLOBALS: $y = 40; function addition() { $GLOBALS["z"] = $GLOBALS["x"] + $GLOBALS["y"]; . echo $z; . ?> echo "<br>"; echo $_SERVER["SERVER_NAME"]; echo "<br>";

Mar 29, 2021 · There are several predefined variables in PHP that are considered as superglobals, which means that you don’t need to use the global keyword to access them. The superglobal variables are available in all scopes of a script. Let’s have a quick look at the superglobal variables in PHP: $GLOBALS $_SERVER …

Mar 2, 2025 · The $_GLOBALS superglobal is an associative array that holds references to all global variables in the global scope. PHP stores all the global variables in an associative array with the help of $_GLOBALS[name of the variable].