usort by nested array values doesn't work

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5,369 stars (5,369 stars)

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Avg merge 3d 12h (Avg merge 3d 12h)5 merged PRs in 30d (5 merged PRs in 30d)

Description

Contributor guide

Research direction

Inspect the failing test case at https://psalm.dev/r/dcd5b2f8f8 and trace how Psalm handles usort with nested array values. Identify where the type inference fails.

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

PHP

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

60