What are the best practices for organizing functions within functions in PHP?

When organizing functions within functions in PHP, it is best practice to keep the code modular and maintainable by following a logical structure. One way to achieve this is by defining helper functions within the main function to encapsulate related functionality. This helps in improving code readability and reusability.

function mainFunction() {
    // Main function logic
    
    function helperFunction1() {
        // Helper function 1 logic
    }
    
    function helperFunction2() {
        // Helper function 2 logic
    }
    
    // Call helper functions within the main function
    helperFunction1();
    helperFunction2();
}

// Call the main function
mainFunction();