--- title: "PHP & Laravel Interview Questions (2026): By Level, With Model Answers" url: https://weworkworldwide.com/php-laravel-interview-questions/ description: "PHP and Laravel interview questions for junior, mid and senior developers — Eloquent, the container, queues and security — with model answers and red flags." date: 2026-07-04T15:36:24+00:00 source: https://weworkworldwide.com/llms.txt --- # PHP & Laravel Interview Questions (2026): By Level, With Model Answers How to use this PHP has grown up, and Laravel hides a lot of machinery. These questions check whether a candidate understands what the framework is doing for them. Hiring a PHP & Laravel developer is easy. Telling a real one from a convincing résumé is the hard part — and it’s most of what we do. These are grouped by level, because the same question that stretches a junior is a warm-up for a senior. ## Junior PHP & Laravel interview questions 0–2 years PHP and Laravel basics. ### What is the difference between `==` and `===` in PHP? What a strong answer covers `===` checks value and type; `==` does type juggling that causes surprising comparisons. Red flag Relies on `==` and hits coercion bugs. ### What is the request lifecycle in Laravel? What a strong answer covers The request enters through the front controller, passes middleware, is routed to a controller, and a response returns through middleware. Red flag No idea where middleware sits. ### What is Eloquent? What a strong answer covers Laravel’s ActiveRecord ORM mapping models to tables with relationships, scopes and mutators. Red flag Writes raw queries and ignores relationships. ### What are migrations and seeders? What a strong answer covers Version-controlled schema definitions and sample-data population for reproducible databases. Red flag Changes the DB manually and it drifts between environments. ### What is Blade? What a strong answer covers Laravel’s templating engine with inheritance, components and safe output escaping by default. Red flag Echoes unescaped user input into HTML. ### What is the difference between `include`/`require`? What a strong answer covers Both import files; `require` fails fatally if missing, `include` only warns. Red flag Uses them interchangeably with no error handling. ### What are routes and route model binding? What a strong answer covers Routes map URLs to actions; model binding auto-resolves a model from a route parameter. Red flag Fetches the model manually and duplicates lookups. ### What are environment files and config? What a strong answer covers `.env` holds per-environment secrets loaded into config; it should never be committed. Red flag Hardcodes credentials in code or commits `.env`. ## Mid-level PHP & Laravel interview questions 2–5 years Eloquent, container and queues. ### What is the service container and dependency injection? What a strong answer covers An IoC container that resolves and injects dependencies, enabling loose coupling and testability. Red flag News up dependencies manually inside classes. ### What are service providers? What a strong answer covers Bootstrap classes that bind services into the container and configure the framework. Red flag Puts bootstrapping logic in random places. ### How does eager loading avoid N+1 queries? What a strong answer covers `with()` loads relations up front instead of one query per record accessed in a loop. Red flag Loops over records accessing relations lazily. ### How do queues and jobs work? What a strong answer covers Slow work is pushed to a queue and processed by workers, keeping requests fast; failed jobs can retry. Red flag Sends emails and processes files inline in the request. ### What is middleware used for? What a strong answer covers Cross-cutting request filtering such as auth, throttling and CORS, running before/after the controller. Red flag Duplicates auth checks in every controller. ### What are accessors, mutators and casts? What a strong answer covers They transform attribute values on read/write and cast DB columns to native types (dates, arrays, enums). Red flag Transforms data manually everywhere it’s used. ### How does Laravel handle validation? What a strong answer covers Form requests or the validator define rules; validation runs before the controller logic and returns errors automatically. Red flag Validates ad hoc and trusts client input. ### How do events and listeners work? What a strong answer covers A publish/subscribe mechanism to decouple side effects (e.g. sending a welcome email) from the main action. Red flag Hardcodes every side effect into the controller. ## Senior PHP & Laravel interview questions 5+ years Performance, security and architecture. ### How do you prevent SQL injection and XSS in PHP? What a strong answer covers Parameterised queries or the ORM, and escaping output (Blade does this by default); never interpolate raw input. Red flag Concatenates input into SQL or echoes it unescaped. ### How do you optimise a slow Laravel app? What a strong answer covers Fix N+1 queries, add indexes, cache expensive work, use queues, and eager-load; profile with a debugbar or APM. Red flag Adds servers instead of fixing query patterns. ### How do you structure a large Laravel codebase? What a strong answer covers Service and action classes, form requests, repositories or query objects, and clear domain boundaries beyond default MVC. Red flag Fat controllers and models holding everything. ### How does caching work and how do you invalidate it? What a strong answer covers Multiple stores (Redis, file), cache tags, and careful key design; stale data comes from missing invalidation. Red flag Caches with no expiry or invalidation plan. ### How do you handle long-running and scheduled tasks? What a strong answer covers The scheduler for cron-like tasks and queue workers for async jobs, monitored and supervised. Red flag Relies on manual scripts and cron with no monitoring. ### How do modern PHP features change how you write code? What a strong answer covers Types, enums, readonly properties, attributes and JIT improve safety and performance over old PHP. Red flag Writes PHP as if it were still version 5. ### How do you keep a legacy PHP app maintainable? What a strong answer covers Add tests, introduce Composer and autoloading, isolate legacy code behind interfaces, and refactor incrementally. Red flag Proposes a rewrite instead of incremental improvement. ### How do you scale sessions and state across servers? What a strong answer covers Externalise sessions and cache to Redis so any app server can handle any request. Red flag Keeps sessions on local disk and breaks under load balancing. **Skip the screening entirely.**We vet PHP & Laravel engineers so you don’t have to — embed one in your team, or have us build it. [Hire PHP & Laravel developers](https://weworkworldwide.com/hire-remote-php-developers/)[Compare us](https://weworkworldwide.com/compare/) Build and score a full interview with our free [interview scorecard tool](https://weworkworldwide.com/developer-interview-scorecard/), browse the [full question hub](https://weworkworldwide.com/interview-questions/), or see [how we interview engineers](https://weworkworldwide.com/how-we-interview-engineers/).