Where can beginners find tutorials or resources to learn more about defining and using functions in PHP?

Beginners can find tutorials and resources on websites like W3Schools, PHP.net, and tutorialspoint to learn more about defining and using functions in PHP. These resources provide step-by-step guides, examples, and explanations to help beginners understand the concept of functions in PHP and how to use them effectively in their code.

<?php
// Define a simple function in PHP
function greet($name) {
    echo "Hello, $name!";
}

// Call the function
greet("John");
?>