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Doc Bug #72201 The doc of the callback param of array_udiff_assoc is inaccurate
Submitted: 2016-05-11 17:54 UTC Modified: 2020-12-28 15:42 UTC
Votes:1
Avg. Score:3.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: eran dot kornblau at kaltura dot com Assigned: cmb (profile)
Status: Wont fix Package: Arrays related
PHP Version: Irrelevant OS:
Private report: No CVE-ID: None
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From: eran dot kornblau at kaltura dot com
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 [2016-05-11 17:54 UTC] eran dot kornblau at kaltura dot com 
Description:
------------
Looking at the code, this function only cares whether the callback returns zero or nonzero, it does not care whether the value is negative or positive like the docs say. This makes sense because this function does not involve any ordering, only comparison of elements

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 [2017-01-28 17:43 UTC] cmb@php.net
-Package: Documentation problem +Package: Arrays related
 [2018-10-02 21:35 UTC] cmb@php.net
-Status: Open +Status: Verified
 [2018-10-02 21:35 UTC] cmb@php.net 
Same for array_udiff(), array_udiff_uassoc(), array_uintersect(),
array_uintersect_assoc() and array_uintersect_uassoc().
 [2020-12-28 15:42 UTC] cmb@php.net
-Status: Verified +Status: Wont fix -Assigned To: +Assigned To: cmb
 [2020-12-28 15:42 UTC] cmb@php.net 
Disregard my comment above.  Actually, the functions which
*currently* do not care about anything than (in)equality to zero
are: array_diff_key(), array_diff_assoc(), array_udiff_assoc(),
array_intersect_key(), array_intersect_assoc() and
array_uintersect_assoc().

However, at least in theory the implementation of these functions
may change in the future so they use some kind of ordering, so
changing the docs could introduce forward compatibility issues.
 
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