Preparing for a PHP developer interview? Whether you're a fresher or a working professional brushing up your skills, this comprehensive list of 100+ PHP Interview Questions and Answers is your ultimate prep guide.
From core PHP fundamentals to OOP, MySQL integration, and framework-related topics like Laravel and CodeIgniter, this list covers it all. Designed for all levels — beginner, intermediate, and advanced.
📌 What’s Inside?
You’ll find:
- ✅ Real-world interview questions
- 💬 Concise and clear answers
- 🎓 Categorized by difficulty level
- ⚙️ Covers PHP, MySQL, OOP, Sessions, Security, and more
💡 Why Use This Guide?
- 📚 Ideal for job interviews, exams, or brushing up
- 🔒 Includes best practices and secure coding questions
- 🧩 Easy-to-understand answers for each concept
- 💼 Compiled from real interviews at companies like TCS, Infosys, Wipro, and more
📂 Topics Covered
Here’s a quick breakdown of categories:
- 🔹 Core PHP (Basics, Syntax, Superglobals)
- 🔹 OOP in PHP (Class, Object, Inheritance, Interface, Traits)
- 🔹 MySQL & PHP (CRUD, Joins, PDO vs MySQLi)
- 🔹 Forms & Validation (GET, POST, sanitization)
- 🔹 Sessions & Cookies
- 🔹 Error Handling
- 🔹 File Handling
- 🔹 PHP Security
- 🔹 PHP 7 & 8 Features
- 🔹 Laravel & Framework-specific questions
✨ Sample Questions
Q1. What is PHP?
PHP (Hypertext Preprocessor) is a widely-used open-source server-side scripting language designed for web development.
Q2. What is the difference between include() and require()?
-
include()shows a warning if the file is missing and continues execution. -
require()throws a fatal error and stops execution if the file is missing.
Q3. Explain the use of $_POST and $_GET.
-
$_POST: Collects data from forms using POST method. -
$_GET: Collects data sent via URL parameters.
Q4. What is a session in PHP?
A session is used to store data across multiple pages. Session data is stored on the server.
Q5. What is the difference between == and === in PHP?
-
==: Compares values, allows type conversion -
===: Compares both value and type (strict comparison)
...
👨💻 Want to see the full list of 100 questions? Scroll to the bottom or download the full guide!
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Good luck with your interview prep — you've got this!
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Happy Coding! 💻
— @robin-ivi
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