Posted by Ewoud Dronkert on 06/02/05 16:08

On Thu, 02 Jun 2005 13:09:31 +0100, James wrote:
> Someone has wrote some info on how to do this here, as a user
> contributed note: http://php.net/variables
> [...] credit goes to lucas karisny.

Yeah. If you have no need for local scope you can trim the function a
little. Also with simpler unique value generation:

function f( &$x )
{
$old = $x;
$x = md5( uniqid( mt_rand(), TRUE ) );
foreach ( $GLOBALS as $k => $v )
if ( $v === $x )
{
$x = $old;
return $k;
}
return FALSE;
}

$a = 'test';
$b = 'test';
echo f( $a ); // 'a'
echo f( $b ); // 'b'


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