User-Defined Functions

User-Defined Functions are functions created by the PHP programmer to encapsulate a specific block of code and give it a name. These functions are defined by the user to perform a particular task or set of tasks. They contribute to code organization, reusability, and maintainability.

Examples:

<?php

// User-Defined Function to add two numbers

function addNumbers($num1, $num2) {

    return $num1 + $num2;

}

// Calling the function

$result = addNumbers(5, 10);

echo $result; 

?>

Output: 15

In this example:

1. We define a function named addNumbers that takes two parameters ($num1 and $num2).
2. The function body contains the code to add the two numbers, and the result is returned using the return statement.
3. We then call the function with arguments 5 and 10, and the result is stored in the $result variable and echoed to the screen.