Do you have experience using recursive functions in practice?

Yes, in PHP development practice, I have used recursive functions to solve tasks where the data structure or logic naturally involves repeated calls, for example:

• Traversing tree structures (categories, menus).
• Solving problems with subdivision into sub-tasks (e.g., calculating factorial).

An example of a recursive function for calculating factorial:

function factorial($n) {
    if ($n <= 1) {
        return 1;
    }
    return $n * factorial($n - 1);
}

echo factorial(5); // 120

It is important to control the base case to avoid infinite recursion and stack overflow.