Work Professionals Long runs

Claude migrated a PHP 5.6 website to 8.2 overnight

Ondřej Mirtes, creator of PHPStan, asked Claude to migrate a mid-sized website from PHP 5.6 to 8.2 across several major framework versions and generate a Playwright E2E test suite. It ran overnight and succeeded.

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Claude
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Creator of PHPStan
Posted
Ondřej Mirtes@OndrejMirtes

I asked Claude to migrate a mid-sized website from PHP 5.6 to 8.2, including an E2E test suite in Playwright to verify nothing broke, and across several major framework versions too, and it did it literally overnight.

There’s no excuse to run outdated PHP versions in 2026.

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I asked Claude to migrate a mid-sized website from PHP 5.6 to 8.2, including an E2E test suite in Playwright.

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