Basically I'd like to do something like this:
$arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
$avg = array_sum($arr) / count($arr);
$callback = function($val){ return $val < $avg };
return array_filter($arr, $callback);
Is this actually possible? Calculating a variable outside of the anonymous function and using it inside?
See Question&Answers more detail:os