From: jesse at mactechs dot com
Operating system: Irrelevant
PHP version: 4.3.4
PHP Bug Type: Class/Object related
Bug description: comparing (recursive) referenced objects fails
Description:
------------
Recursive object reference comparisons fail in PHP4.x.
Alternative to my "exptected result" below, I would
settle for one of a couple of things. One would be a
boolean comparison function that returns true if two
references point to the same data, or another could be
simply a boolean function that returns true if two
objects are the same (with recursing to all the values).
I'm aware the Zend Engine 2/PHP5 identity operator works
in the fashion I'd like now, but I'd still consider this
a bug for Zend Engine/PHP4.
Reproduce code:
---------------
// key failing element here is B::is_ref
class A {
var $a_ref;
function set_ref (&$obj) {
$this->a_ref =& $obj; } }
class B {
var $b_ref;
function set_ref (&$obj) {
$this->b_ref =& $obj; }
function is_ref (&$obj) {
if ($obj === $this->b_ref)
return true; } }
$a = new A; $b = new B;
$a->set_ref ($b); $b->set_ref ($a);
var_dump ($b->is_ref ($a));
Expected result:
----------------
I would expect that "if ($obj === $this->b_ref)" would
return true if they (the two object references being
compared) referenced the same object, and
false if they didnt. Please see my description, as
well.
Actual result:
--------------
"
Fatal error: Nesting level too deep - recursive
dependency? in /path-to/test.php on line 12
"
--
Edit bug report at http://bugs.php.net/?id=27707&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=27707&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=27707&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=27707&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=27707&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=27707&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=27707&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=27707&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=27707&r=support
Expected behavior: http://bugs.php.net/fix.php?id=27707&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=27707&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=27707&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=27707&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=27707&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=27707&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=27707&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=27707&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=27707&r=float
