Remove duplicate values from an array

Question

Possible Duplicate:
How to remove duplicate values from a multi-dimensional array in PHP

I would like to know how to remove the duplicate array values from the following

Array (
   [0] => Array ( )
   [1] => Array (
      [0] => 7
      [1] => 8
   )
   [2] => Array (
      [0] => 7
   )
   [3] => Array (
      [0] => 8
   )
)

Answer 1

Use array_unique PHP function.

array_unique($variable);