vimeo/psalm

Psalm doesn't notice session_unset()

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#9,198 opened on Jan 29, 2023

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Help wantedeasy problemsenhancement

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Description

For example: https://psalm.dev/r/c1dc7af1fb

When the session is cleared by setting it to an empty array Psalm is aware that the key doesn't exist, but if the same is done using session_unset() Psalm doesn't notice this fact.

Contributor guide

Research direction
Investigate how Psalm tracks side effects of PHP functions and add a stub or handling for session unset to mark $ SESSION as cleared.
Tech stack
php
Domain
backend
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GitPHP
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75