array(1) {
  [0]=>
  string(3) "PHP"
}
<br>array(2) {
  [0]=>
  string(3) "PHP"
  [1]=>
  string(4) "JAVA"
}
<br>array(2) {
  [0]=>
  string(0) ""
  [1]=>
  string(0) ""
}