Ideas
Dev toolsphptestingmigration

PHP version compatibility checker

Build a tool that scans PHP codebases for compatibility issues before version upgrades. Catch deprecated functions and breaking changes.

Why now

PHP 8.x updates frequently break backwards compatibility, stalling upgrades.

Who for
PHP developers
Business model
Paid CLI tool
Effort
A weekend

Many PHP sites remain on outdated versions because developers fear breaking changes during upgrades.

A static analyzer that identifies version-specific incompatibilities in code would make upgrades less risky.

Monetize through CLI tool sales to agencies and a SaaS version for teams.

MVP could check for removed functions between two specified versions.

Competing with free alternatives like PHPCompatibility would be tough.

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PHP version compatibility checker — Ideas