配列から、同じ値の要素を削除する(array_unique)

<?php
$array = array("0", "1", "2", "1", "2");
print_r($array);
print(<br>);
print_r(array_unique($array));
?>

Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 1 [4] => 2 )
Array ( [0] => 0 [1] => 1 [2] => 2 )