PHP Functions Example

Using the built-in function strlen() to find the length of 'Hello, World!': 13

Using a user-defined function to calculate the area of a rectangle with length 10 and width 5: 50

Functions in PHP are code blocks that may be written and reused to do specified tasks. Functions are a basic notion in programming that provide various benefits

In this example, we used the built-in function strlen() to find the length of a string. We also defined a user-defined function calculateRectangleArea() to calculate the area of a rectangle, demonstrating the concept of custom functions.