string(5) "hello"
array(2) {
  ["nasty"]=>
  string(4) "test"
  ["hello"]=>
  string(5) "nasty"
}
string(5) "hello"
array(2) {
  ["nasty"]=>
  string(4) "test"
  ["hello"]=>
  string(5) "nasty"
}
string(5) "hello"
array(2) {
  ["nasty"]=>
  string(4) "test"
  ["hello"]=>
  string(5) "nasty"
}