PHP - Function inside a Function. Good or bad?

Question

I would like to know if it is a good thing to define a function inside another function in PHP. Isn\'t it better to define it before the function (and not inside) in terms o

Answer 1

It depends on the situation, as it may be more desirable than using create_function(). However you should know that the function which is created within the function is global in scope.

function creator() {

    function inside() {

        echo "hi.";
    }
}

creator();
inside();

This will print "hi." even though the inside() function was created "inside" of the creator function. So if you have a function in a loop which is creating a function, you need to check to see if the function exists, otherwise it will cause a function exists error after the first loop.