- array_unique: documentation ( source)
<?php
$sam = array(Array ( "0" => Array ( "0" => 24 ),"1" => Array("0" => 25)),
Array ( "0" => Array ( "0" => 24 ),"1" => Array("0" => 25)),
Array ( "0" => Array ( "0" => 24 ),"1" => Array("0" => 25 )));
$sam=array_unique($sam);