PHP The 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):
<!DOCTYPE html>
<html>
<body>
<?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
?>
</body>
</html>
***************
the same result as below
***************
<!DOCTYPE html>
<html>
<body>
<?php
$x = 5;
$y = 10;
function myTest() {
$GLOBALS['y'] = $GLOBALS['x'] + $GLOBALS['y'];
}
myTest();
echo $y;
?>
</body>
</html>
=============
output is 15
