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=== on objects fails with recursion! WTH?

php.internals

Amin Azez

20 years ago

if ($object1===$object2)

does a recursive check!
"Fatal error: Nesting level too deep - recursive dependency?"
Whats going on?

I've go lots of object references all highly recursive and I just
sometimes need to check if two objects are the same object i.e. they
have the same storage address; I don't need to (and can't afford the
time) to recursively check every field.

Is there a ==== instead that REALLY does what it seems === is trying to
fake, presumably to cover up all the object copying that is normally
going on but that I've managed to avoid?

Sam

Wez Furlong

20 years ago

I proposed a patch to fix this a while back (at least a year ago).

--Wez.

On 11/1/05, Amin Azez <azez@ufomechanic.net> wrote:

Jochem Maas

20 years ago

this is a php4-only problem right?
(or is the little test below insufficient to test the stated problem?)

THIS:
----------------------
php -r '
class A { public $b; function __construct(B $b) { $this->b = $b; $b->setA($this); } }
class B { public $a; function setA(A $a) { $this->a = $a; } }

$y = new B; $x = new A($y);
$z = $x;
$clone = clone $x;
var_dump(($x === $z), ($x === $clone), ($x == $z), ($x == $clone));
'

RETURNS (php5.0.4):
----------------------
bool(true)
bool(false)
bool(true)
bool(true)


Wez Furlong wrote:

Amin Azez

20 years ago

Wez Furlong wrote:

> I proposed a patch to fix this a while back (at least a year ago).

I'm trying to file it as a bug, but bugs.php.net seems to be down,
probably busy recusrively comparing objects or something.

Could you post it (or a URL) please so I can patch.
Had you already filed this as a bug report?

Sadly searches on === reveal nothing.


Sam

Wez Furlong

20 years ago

You'll need to search the mailing list archives.

--Wez.

On 11/1/05, Amin Azez <azez@ufomechanic.net> wrote: