What is the significance of using namespaces in PHP and how can they prevent fatal errors like "Call to undefined function"?

Using namespaces in PHP helps prevent naming conflicts between different libraries or classes. It allows you to organize your code into logical groups, making it easier to maintain and understand. By properly defining namespaces, you can avoid fatal errors like "Call to undefined function" because PHP will be able to locate the correct function or class within the specified namespace.

// Define namespace for your class or functions
namespace MyNamespace;

// Define a function within the namespace
function myFunction() {
    // Function implementation
}

// Call the function using the namespace
MyNamespace\myFunction();