Functions in PHP

1. Built-in Function Example: strlen()

The phrase "I love cats, they are so cozy and calm." contains 39 characters.

2. User-defined Function Example

Hello, Freddie! Welcome to learning PHP functions.

Explanation

Functions are reusable blocks of code that perform a specific task. Built-in functions already exist in PHP, such as strlen(), while user-defined functions are created by the programmer. Functions help organize code, reduce repetition, and make programs easier to read and manage.