comparing arrays in php, without caring for the order

Question

I have two arrays, $a and $b here, and need to check if they contain exactly the same elements (independently of the order). I am thinking of using

if (sizeo         


        

Answer 1

Just for your amusement I'll add an example that demonstrates that your conditions is not correct:

Test it.

I would suggest using a different model. Maybe adding the elements as keys of the array, but this is possible only if they are integers or strings.

$arr['itemA'] = true;
$arr['itemB'] = true;

This will enforce uniqueness. With this model you can use your condition on array_keys($arr).