Remove duplicate values from an array
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/307674/how-to-remove-duplicate-values-from-a-multi-dimensional-array-in-php">How to remove duplicate values from a multi-dimensional array in PHP</a>  </p>
</blockquote>



<p>I would like to know how to remove the duplicate array values from the following</p>

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