functions and variables

[nightdesigns]

I've created a function and that works fine and dandy. How can I have the function change the value of a variable that resides outside of the function?

For instance, let's have x = 1

Within the function x = 2

Normally once outside the function x will =1 again. How can I have x = 2 in the main program?

Thanks.

[rgermain]

<? 
$x = 1;
function myFunction($x)
{
	echo  $x = 2;
}

myFunction($x);
?>

[Installer]

That won't change the global $x.

...x will =1 again...

Not really "again", since the two xes (the one in the global scope and the one in the function scope) are two separate variables that happen to share the same name, but not the same scope.

A couple ways to do it:

function func_a()
{
    return 2;
}

$x = 1;
echo $x;  // 1
$x = func_a();
echo $x;  // 2

function func_b(& $y)
{
    $y = 2;
}

$x = 1;
echo $x;  // 1
func_b($x);
echo $x;  // 2