PHP global keyword, phpglobal keyword_PHP tutorial

PHP global keyword, phpglobal keyword

global keyword is used to access global variables inside a function.

<?php
$x = 5;
$y = 10;

function myTest(){  
    global $x,$y;
    $x = $x+$y;
}

myTest();
echo $x; //15

PHP stores all global variables in an array named $GLOBALS[index]. Index saves the name of the variable. This array can be accessed inside the function, or global variables can be updated directly;

The above example can be rewritten as follows:

<?php
$x = 5;
$y=10;

function myTest(){
    $GLOBALS['x'] = $GLOBALS['x'] + $GLOBALS['y'];
}

myTest();
echo $x; //15

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