[PHP] $myobject->$$varname doens't work ??

[greg]

Hello,

I was just trying this but it doesn't work :
<?php
class a {
  public $foo = "hello world";
}
$obj = new a();
$varname = "foo";
echo $obj->$$varname;
$bar = "this is working";
$varname = "bar";
echo $$varname; // display "this is working" as expected
?>
Is it a bug or is it normal ?
I didn't find anything about it in documentation (php4 / php5).
Greg

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