PHP  global Keyword

• The global keyword is used to access a global variable from within a function. 
• To do this, use the global keyword before the variables (inside the function):

exmaple:-

<?php

$x=5;

$y=10;

function myTest() {

global $x,$y;

$y=$x+$y;

}

myTest();

echo $y; // outputs 15

?>