array(4) {
  [0]=>
  int(4)
  [1]=>
  int(2)
  [7]=>
  int(3)
  [10]=>
  int(5)
}
string(1) "4"
string(1) "2"
string(1) "3"
string(1) "5"
string(0) ""
string(0) ""
string(0) ""
string(0) ""