php 数组去除重复值



我要把花红线的键值去过 只留下后面的两个键值 应该怎么实现 数组
[解决办法]

$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
)
[解决办法]

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

print_r($res);

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