Difference Between Predefined and User-Defined Functions in PHP (Explained with Real Examples)
In this video, I’ve explained in detail the difference between Predefined and User-Defined Functions in PHP, one of the most essential concepts for every beginner in web development.
You’ll learn:
✅ W
hat are Predefined (Built-in) Functions in PHP — like strlen(), date(), round(), and var_dump()
✅ What are U
ser-Defined Functions and how to create them using the function keyword
✅ The main differences between both with examples
✅ Why functions make your PHP code reusable and easier to maintain
✅ Real-world examples from actual PHP projects
By the end of this video, you’ll have a clear idea of when to use built-in functions and when to create your own, helping you write clean and professional PHP code.
💡 Perfect for:
Students, beginners, and anyone learning PHP as part of the Full Stack Developer journey.
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