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Date: Fri, 28 Nov 2014 14:14:22 +0100
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To: Bostjan Skufca <bostjan@a2o.si>
Cc: PHP Internals List <internals@lists.php.net>
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Subject: Re: [PHP-DEV] New function: spl_object_id() or spl_object_handle()
From: krebs.seb@gmail.com (Sebastian Krebs)

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2014-11-28 2:13 GMT+01:00 Bostjan Skufca <bostjan@a2o.si>:

> Hello everyone,
>
> this is a proposal to add new function to PHP core: spl_object_id()
>
>
> The story:
> ========
> Recently I was debugging some larger libraries and sorely missed a function
> that would return an object ID. A function called spl_object_hash() exists,
> but it returns identical hashes for equal objects.


It returns unique IDs for existing objects. A hash is only reused only when
the corresponding object was removed by the GC earlier.
So actually asking me it makes more sense to "fix" the behaviour of
spl_object_hash(),


> You need object ID to be
> really sure if two references are indeed the same object or two identical
> objects.
>
> Most of the meat is described in this StackOverflow thread:
>
> http://stackoverflow.com/questions/2872366/get-instance-id-of-an-object-in-php
>
> The OP proposes OB+var_dump() magic, which works if objects are small.
> Unfortunatelly I was hitting "Allowed memory exceeded".
>
> The second answer, given by Gustavo Lopes, describes how to create an
> extension for this, which provides new function, named spl_object_id(). I
> believe this function should be included in PHP core.
>
>
>
> Sample implementation (not tested):
> =============================
> /* {{{ proto string spl_object_id(object obj)
>  Return id for given object */
> PHP_FUNCTION(spl_object_id)
> {
> zval *obj;
>
> if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "o", &obj) == FAILURE)
> {
> return;
> }
>  RETURN_LONG(Z_OBJ_HANDLE_P(obj));
> }
> /* }}} */
>
>
>
> Two questions:
> ============
> 1. Do you think this function should be included in PHP core?
> 2. If so, what should this function be called? I am undecided between
> spl_object_id() and spl_object_handle() and corresponding get_...()
> variants.
>
> Ad 2. I lean towards ..._id() as ..._handle() suggests that you can do
> something with that handle (think "open file handle", etc).
>
>
> What is your opinion about this?
>
> Tnx,
> b.
>



-- 
github.com/KingCrunch

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