array_unique with SORT_REGULAR flag does not always work as expected
Open
Nobody has claimed this yet.
Category: Arrays
enhancement
Extension: standard
- Dominant language
- XML
- Stars
- 596
- Forks
- 890
- Avg merge
- 1d 15h
- Merged PRs (30d)
- 55
Description
Description
The following code:
<?php
print_r(array_unique(["100","100","25","15p100","25","25"], SORT_REGULAR));
Resulted in this output:
Array
(
[0] => 100
[2] => 25
[3] => 15p100
[4] => 25
)
But I expected this output instead:
Array
(
[0] => 100
[2] => 25
[3] => 15p100
)
It happens because of the value "15p100", if I remove the letter "p" it works. It happens with any character not digit (example "15+100").
PHP Version
PHP 8.1.2
Operating System
No response
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the reported array_unique example with SORT_REGULAR on PHP 8.1.2 and compare the observed output with the expected output in the issue. Locate the relevant array_unique documentation entry, then clarify the documented behavior once the discrepancy is understood; the issue is 330 days since its last comment.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- php
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100