I tried to access the autoglobal variables via the variable variables 'trick'. But that doesn't work within functions.

Examples:

That works:
<?
?><hr><?
$test1 = '_TEST';
$test2 = '_SERVER';
$_TEST = '[test1]';
?><pre><?
var_dump( $test1 );
var_dump( ${'_TEST'} );
var_dump( ${$test1} );
var_dump( ${"$test1"} );
?><hr><?
var_dump( $test2 );
var_dump( ${'_SERVER'} );
var_dump( ${$test2} );
var_dump( ${"$test2"} );
?></pre><hr><?


That doesn't work:
<?
function foolme()
{
	?><hr><?
	$test1 = '_TEST';
	$test2 = '_SERVER';
	$_TEST = '[test1]';
	?><pre><?
	var_dump( $test1 );
	var_dump( ${'_TEST'} );
	var_dump( ${$test1} );
	var_dump( ${"$test1"} );
	?><hr><?
	var_dump( $test2 );
	var_dump( ${'_SERVER'} );
	var_dump( ${$test2} );
	var_dump( ${"$test2"} );
	?></pre><hr><?
}
foolme();


--
I found that, while writing a class for processing html forms:

function __wakeup() {
	$method = $this->_method;
	$this->_FORM = &${"_$method"};
}