$arr = [
0=> [id=>1, res=>2],
1=> [id=>2, res=>42],
2=> [id=>3, res=>25],
]
$arr2 = [
0=> [id=>1, res=>2],
1=> [id=>2, res=>42],
2=> [id=>3, res=>25],
3=> [id=>34 res=>25],
]
$arr = [
0=> [id=>1, res=>2],
1=> [id=>2, res=>42],
2=> [id=>3, res=>25],
3=> [],
]