note 27894 deleted from migration4.variables by danbrown

Note Submitter: brooke at jump dot net ---- Better (and likely more correct) way to look at it is this: In php3, the global statement caused named variables to become aliases. In php4, the global statement constructs references. In php3, there are no references. In php4, references are what get unset, not the pointed-to values. The same change affects function parameters passed by reference. In php3, you got aliases. In php4, you get references. If you unset a reference, then you've lost only the reference. The original variable remains. function foo(&$bar) { unset($bar); $bar = 27; } $x = 5; foo($x); assert($x == 5);