Object Equality View as Markdown

(Note: this email seems to relate to this list in my opinion, but I
have been chewed out before when posting such emails)

I am using PHP 4.3.2, and it seems that testing objects for equality
(with == or ===) causes an internal bug when the objects have recursive
instance variables. That is, if the objects being tested have a
variable that is a reference to an object that has a variable that is a
reference to the first object, then the PHP processor dies. What can be
done about this? If this needs to be sent to another mailing list,
please let me know.

Dirty hack -- create a unique ID instance variable for objects via their
constructor. Implement equality check with:

if( $obj1->uid == $obj2->uid )
{
    // Same object, yaaaaaaaaaaay!
}

Cheers,
Rob.

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Interestingly enough, I brought up this issue just over a year
ago. Even more interesting is that I stumbled across my original
post from that time while looking into something else today.

http://news.php.net/article.php?group=php.dev&article=88735

(patch included)

--Wez.

----- Original Message -----
From: LingWitt@insightbb.com
To: internals@lists.php.net
Sent: Wednesday, October 08, 2003 3:21 PM
Subject: [PHP-DEV] Object Equality

(Note: this email seems to relate to this list in my opinion, but I
have been chewed out before when posting such emails)

I am using PHP 4.3.2, and it seems that testing objects for equality
(with == or ===) causes an internal bug when the objects have recursive
instance variables. That is, if the objects being tested have a
variable that is a reference to an object that has a variable that is a
reference to the first object, then the PHP processor dies. What can be
done about this? If this needs to be sent to another mailing list,
please let me know.

Thank you.

Hi Wez,

Your patch breaks BC in 4.3.x. As the problem has been solved in PHP 5, I
suggest we don't add the patch and wait for the major version to break BC
(very slightly).

Andi

At 03:42 PM 10/9/2003 +0100, Wez Furlong wrote:

Interestingly enough, I brought up this issue just over a year
ago. Even more interesting is that I stumbled across my original
post from that time while looking into something else today.

http://news.php.net/article.php?group=php.dev&article=88735

(patch included)

--Wez.

----- Original Message -----
From: LingWitt@insightbb.com
To: internals@lists.php.net
Sent: Wednesday, October 08, 2003 3:21 PM
Subject: [PHP-DEV] Object Equality

(Note: this email seems to relate to this list in my opinion, but I
have been chewed out before when posting such emails)

I am using PHP 4.3.2, and it seems that testing objects for equality
(with == or ===) causes an internal bug when the objects have recursive
instance variables. That is, if the objects being tested have a
variable that is a reference to an object that has a variable that is a
reference to the first object, then the PHP processor dies. What can be
done about this? If this needs to be sent to another mailing list,
please let me know.

Thank you.