How to buid array and display random values?

:) I can't write code for array. Example:

I want have page and using include import file with array. In array i want put in new line comment example:

id-1 = first one
id-2 = second one 
etc... 
id-333 = other comment

Next i want to display random value from array. Example:

Mr. Bad coder write comment: 
first one 

How do this? I have read a lot of tutorials and my code looks like this:

array.php file:

$array_names = array(
  '1' => 'Mike',
  '2' => 'John',
  '3' => 'Ana',
);

File to display array:

<?php 
include('array.php');
echo $array_names; ?> was write a comment!