Array
(
    [0] => John
    [1] => Sally
    [2] => Jane
    [3] => Peter
)
<br><br><br>Array
(
    [2135] => Doe
    [3245] => Smith
    [5342] => Jones
    [5623] => Doe
)
<br><br><br>Array
(
    [2135] => John
    [3245] => Sally
    [5342] => Jane
    [5623] => Peter
)
<br><br><br>Array
(
    [0] => Doe
    [1] => Smith
    [2] => Jones
    [3] => Doe
    [4] => John
    [5] => Sally
    [6] => Jane
    [7] => Peter
)