Two dimension Array Example in PHP

this example shows the behavior of two dimension array.two dimension means in rows and columns like table.
i.e.
[0][0]  [0][1]  [0][2]


[1][0]  [1][1]  [1][2]


[2][0]  [2][1]  [2][2]

PHP Example of two dimension array:


<?php
$relation = array
  (
  "families"=>array
  (
  "Mazhar",
  "Tasawar",
  "Yawar"
  ),
  "Relatives"=>array
  (
  "Kamran"
  ),
  "Friends"=>array
  (
  "Awais",
  "Ramiz",
  "Saad"
  )
  );  
echo $ relation['families'][2] . " is a part of the family";  
?>