What are the differences between the 'use' keyword and 'namespace' in PHP, and how should they be correctly utilized in code?

The 'use' keyword in PHP is used to import namespaces into the current namespace, allowing you to use classes, interfaces, or functions from other namespaces without having to fully qualify them. On the other hand, the 'namespace' keyword is used to declare the current namespace for a particular block of code. To correctly utilize them in code, you should use the 'namespace' keyword to define the namespace of your code and the 'use' keyword to import classes, interfaces, or functions from other namespaces.

<?php

// Define the namespace for your code
namespace MyNamespace;

// Import a class from another namespace using the 'use' keyword
use AnotherNamespace\AnotherClass;

// Now you can use the imported class within your namespace
$object = new AnotherClass();

// Rest of your code here

?>