php 數組去除重複值

我要把花紅線的索引值去過 只留下後面的兩個索引值 應該怎麼實現

回複討論(解決方案)

$arr=array(38,39,41,38,39,41,42,43);$c=array_count_values($arr);function foo($v){    global $c;    if($c[$v]==1){  return true;}return false;}print_r(array_filter($arr,'foo'));

Array
(
[6] => 42
[7] => 43
)

$ar = array(38, 39, 40, 41, 38, 39, 40, 41, 42, 43);foreach(array_count_values($ar) as $k=>$v)  if($v == 1) $res[] = $k;print_r($res);

Array ( [0] => 42 [1] => 43 )

也可以這樣寫

$ar = array(38, 39, 40, 41, 38, 39, 40, 41, 42, 43);$t = array_intersect(array_count_values($ar), array(1));$t = array_intersect($ar, array_keys($t));print_r($t);

Array ( [8] => 42 [9] => 43 )

