PHP Global Variable

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PHP Global Variable
Posted on: October 10, 2009 at 12:00 AM

PHP Global Variable, In this tutorial gives you an idea about accessing global variables, it provides two ways to access global variable one is global keyword and $GLOBALS associative array.

PHP Global Variable

To access global variable in PHP we need to use global keyword or $GLOBALS associative array

global is a keyword which helps us to access the globally declared variable. There is no limit to use global keyword within a program.

$GLOBALS is an associative array containing references to all global variables, the variable names are the keys of the array.

Code for PHP Global Variable:

<?php

$a=1;

function globe()

{

$a="12";

echo "Value of a is:".$a;

echo "<br />";

global $a;//global keyword helps us to access globally declared variables

echo "Value of a is :".$a;

echo "<br> Other way to access global variable";

echo " <Br>Value of a is :".$GLOBALS["a"];//using $GLOBALS associative array.

}

globe();

Output:

Value of a is:12
Value of a is :1
Other way to access global variable
Value of a is :1

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