How to Fix Dependency Conflict in PHP

Running into a Dependency Conflict in PHP? This guide walks you through the root cause and a practical fix.

Why This Happens

Dependency conflicts arise when two or more packages in your PHP project require incompatible versions of the same library. The package manager cannot find a single version that satisfies all constraints.

How to Fix It

The key is to trace the conflict with composer why and update constraints accordingly:

# Diagnose the conflict
composer why package/name
composer why-not package/name 2.0

# Resolve
composer require package/name:"^2.0" --update-with-all-dependencies

Common Pitfall

One pitfall to avoid: applying a quick workaround that disables the underlying safety check. This masks the real problem and will come back to haunt you later. Consider adding a health check endpoint or startup validation that catches this misconfiguration before it reaches users.

Testing Your Changes

Run your test suite to make sure the fix doesn't introduce regressions. If you don't have tests covering this area, now is a good time to add a simple integration test. A quick manual smoke test across different browsers or environments can also catch edge cases your tests might miss.

Monitoring

To prevent this from recurring unnoticed, set up [Bugsly](https://bugsly.dev) for your PHP project — it monitors errors and gives you actionable alerts.