array(5) {
  [0]=>
  string(3) "PHP"
  [1]=>
  string(6) "PYTHON"
  [2]=>
  string(10) "JAVASCRIPT"
  [3]=>
  string(3) "C++"
  ["C#"]=>
  string(2) "C#"
}
<pre>array(5) {
  [0]=>
  string(3) "PHP"
  [1]=>
  string(6) "PYTHON"
  [2]=>
  string(10) "JAVASCRIPT"
  [3]=>
  string(3) "C++"
  [4]=>
  string(2) "C#"
}
</pre><pre>string(3) "PHP"
</pre><pre>array(4) {
  [0]=>
  string(6) "PYTHON"
  [1]=>
  string(10) "JAVASCRIPT"
  [2]=>
  string(3) "C++"
  ["C#"]=>
  string(2) "C#"
}
</pre><pre>array(5) {
  [0]=>
  string(6) "PYTHON"
  [1]=>
  string(10) "JAVASCRIPT"
  [2]=>
  string(3) "C++"
  ["C#"]=>
  string(2) "C#"
  [4]=>
  string(4) "Rust"
}
</pre>