Question

如果我print_r($pieces);我得到：

Array
(
    [0] => Albany, NY
)
Array
(
    [0] => Albany, NY
    [1] => Albuquerque, NM
    [2] => Atlanta, GA
    [3] => Augusta, ME
    [4] => Billings, MT
    [5] => Baltimore, MD
)
Array
(
    [0] => Albany, NY
    [1] => Albuquerque, NM
    [2] => Atlanta, GA
    [3] => Augusta, ME
    [4] => Billings, MT
    [5] => Birmingham, AL
    [6] => Boise, ID
    [7] => Boston, MA
    [8] => Buffalo, NY
    [9] => Charleston, SC
    [10] => Charleston, WV
)
.....

我需要做的是组合这些数组以获得唯一值。首先，我需要将其拆分为多个数组，然后使用array_combine，但它似乎不起作用。

Answer 1

$unique = array();
foreach ($pieces as $piece) {
    $unique = array_merge($unique, $piece);
}
$unique = array_unique($unique);

或者，如果您使用的是PHP 5.3 +：

array_unique(array_reduce($pieces, function ($a, $p) { return array_merge($a, $p); }, array()));

Answer 2

Bouni的评论有最好的答案：

array_unique（array_reduce（$ pieces，'array_merge'，[]））;

如何将数组合并到自身？

2 个答案: