How does transitioning to OOP in PHP impact the organization of functions and files?

Transitioning to OOP in PHP impacts the organization of functions and files by promoting encapsulation, inheritance, and polymorphism. This means that functions are grouped into classes based on their functionality, leading to better code organization and reusability. Files are typically organized into directories representing different classes, making it easier to manage and maintain the codebase. 

// Example of organizing functions into classes in PHP OOP

class Calculator {
    public function add($a, $b) {
        return $a + $b;
    }

    public function subtract($a, $b) {
        return $a - $b;
    }
}

$calc = new Calculator();
echo $calc->add(5, 3); // Output: 8
echo $calc->subtract(5, 3); // Output: 2

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