Passing a function return result into a foreach loop

Question

Out of curiosity, are the two options below functionally equivalent?

$array_variable = function_that_creates_an_array();
foreach($array_variable as $a){
    do_something()
}

vs.

foreach(function_that_creates_an_array() as $a){
    do_something()
}

Just want to make sure I'm not calling the function on every iteration or anything dumb like that.

Thanks!

Answer 1

Yes, they are basically equivalent.

The only difference is the first one will add a variable to the current scope (i.e. if your in the global scope).