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Detect Assignment to Unused Variable #12789
Description
Feature request
An assignment to an otherwise unused variable can indicate a typo in nominally "correct" code. See https://phpstan.org/r/d60aae42-522a-4bc5-823c-ac895016be53
This bears some relation to issue #12012, but I think it is distinct enough to stand on its own.
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Activity
mvorisek commentedon Sep 9, 2025
another repro: https://phpstan.org/r/a1506fc1-66bf-4c8e-94ba-c76bbf4f9fa2 (from #13472)
mikethea1 commentedon Mar 11, 2026
Another example from #14258: https://phpstan.org/r/6daee886-df13-4ef5-adb9-a13d96f59415
Add regression test for #12789
Add regression test for #12789
Add regression test for #12789
Add regression test for #12789
Add regression test for #12789
Add regression test for #12789
Add regression test for #12789
Updated PHPStan to commit 5f42d5dfbc1e027405f3137f4aa674e682f411fe
oleibman commentedon Sep 10, 2026
Thank you.
github-actions commentedon Oct 12, 2026
This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.