Add note for WeakMap::offsetExists behavoir for NULL values
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Description
From manual page: https://php.net/weakmap.offsetexists
Hi,
I just came across the following behavior of the WeakMap. A hint in the documentation would have helped me. Hence this entry.
When assigning NULL to an offset of a WeakMap, a call to WeakMap::offsetExists returns false, even when the actual offset exists.
According to https://github.com/php/php-src/issues/8437, this is currently intended.
Therefore, I suggest adding a note like "NULL values return false, even if the offset was previously set."
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 with the WeakMap::offsetExists manual page at https://php.net/weakmap.offsetexists and review the surrounding documentation. Add a note explaining that NULL values return false even when the offset was previously set, then verify that the wording accurately reflects the intended behavior described in PHP issue 8437.
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Assessment
- Tech stack
- php
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 1/5
- Estimated time
- Under an hour
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 55/100