Unexpected results with `array_map` when using arrow functions in PHP 8.1
I'm experimenting with I'm experiencing unexpected behavior when using `array_map` with arrow functions in PHP 8.1... I have the following code where I'm trying to increment each element of an array by a certain factor: ```php $numbers = [1, 2, 3, 4, 5]; $factor = 2; $result = array_map(fn($n) => $n * $factor, $numbers); print_r($result); ``` I expected the output to be `[2, 4, 6, 8, 10]`, but instead, I'm getting the following behavior: ``` Warning: Trying to access array offset on value of type int in ... ``` After a bit of debugging, I found that if I change the arrow function to a regular anonymous function, it works as expected: ```php $result = array_map(function($n) use ($factor) { return $n * $factor; }, $numbers); ``` I’ve also verified that `$factor` is indeed set to 2, and I've checked for any potential scope issues. However, I’m puzzled why the arrow function isn't working as expected. Is there something I'm missing about how variables are captured in arrow functions when used in `array_map`? Any insights would be appreciated! What's the correct way to implement this? I'm using Php latest in this project. Any help would be greatly appreciated!