Copy PHP Array where elements are positive

Question

trying to transfer one array with a combination of positive and negative numbers to a new array- but only where the elements are positive.

This is what I have so far:

Answer 1

$param = array(-1,2-,3,1,2,4,-1337);
function positive_function($arr)
{
    $temp = array();
    foreach ($arr as &$value) 
    {
        if($value > 0)
        {
            $temp[] = $value
        }
    }
       return $temp;
}