int(1)
array(1) {
  [0]=>
  string(4) "test"
}
int(2)
array(2) {
  [0]=>
  int(1)
  [1]=>
  int(2)
}
int(3)
array(3) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
}