Python and PHP are both mature backend languages with rich ecosystems and wide enterprise adoption. Pitting the languages against each other misses the point,the real question is: what kind of project am I actually dealing with?

PHP: the strength of classic web applications

PHP (with Laravel or Symfony) excels at full business web applications,e-commerce, back-office, SaaS,where you need a batteries-included framework: ORM, authentication, queues, caching, all integrated and documented. Deployment is simple and the hosting ecosystem is huge and mature.

Python: the strength of computation, data, and AI

Python dominates anywhere there is scientific computing, data processing, or AI/ML,the ecosystem (NumPy, Pandas, PyTorch, LangChain) has no real equivalent in PHP. FastAPI has also caught up on pure web APIs: native async performance, automatic OpenAPI docs, strong typing via Pydantic.

• ✓Choose PHP (Laravel/Symfony): classic business web application, team already trained in PHP, need a complete out-of-the-box framework.
• ✓Choose Python (FastAPI): data pipeline, AI/ML service, high-concurrency API, team already trained in Python.
• ✓Both in the same architecture: a Laravel backend for the main app, a dedicated FastAPI microservice for AI,a common and perfectly viable pattern.

// Laravel: route + controller
Route::get('/users/{id}', [UserController::class, 'show']);

public function show(int $id): JsonResponse
{
    return response()->json(User::findOrFail($id));
}

# FastAPI: equivalent route
@app.get("/users/{id}")
async def show(id: int):
    user = await get_user_or_404(id)
    return user

Performance: the nuance that matters

FastAPI (async, ASGI) generally outperforms Laravel (sync, PHP-FPM) in raw throughput on I/O-bound workloads. But in the vast majority of business applications, that is not the real bottleneck,poorly optimized database queries cost far more performance than the language choice itself.

Neither language is objectively superior,they excel on different terrain. The right question is never "Python or PHP", but "what does this project actually need to do, and with which team".