<?php
$x = 5;
$y = 10;
function myTest() {
global $x, $y;
$y = $x + $y;
}
myTest(); // run function
echo $y; // output the new value for variable $y
?>
<?php
$x = 3;
$y = 2;
function myTest() {
$GLOBALS['y'] = $GLOBALS['x'] + $GLOBALS['y'];
}
myTest();
echo $y; // 5
?>
define("GREETING", "mysite.com");
function myTest() {
echo GREETING;
}
myTest(); // mysite.com