Question

我在从数组中删除重复项时遇到了一些麻烦。这是我的代码：

$invoice_numbers = array_unique($invoice_numbers, SORT_REGULAR);
return $response->withJson($invoice_numbers);

$发票编号：

 {
    "0": [
    "8250",
    "8436",
    "8584",
    "8708",
    "8838",
    "9076",
    "9125",
    "9186"
    ],
    "1": [
    "8250",
    "8436",
    "8584",
    "8708",
    "8838",
    "9076",
    "9125",
    "9186",
    "9895"
    ],
    "3": [
    "9758",
    "9799",
    "10168",
    "10227",
    "10465",
    "10517",
    "10655",
    "10729",
    "10758"
    ],
    "4": [
    "9798",
    "10226",
    "10516"
    ],
    "5": [
    "10926",
    "11246",
    "11591",
    "11790",
    "11791",
    "11802",
    "11803"
    ],
    "6": [
    "10897",
    "11002",
    "11142",
    "11277",
    "11279",
    "11345",
    "11458",
    "11478",
    "11492",
    "11498",
    "11501",
    "11526",
    "11676",
    "11761",
    "11780",
    "11781",
    "11833",
    "11946",
    "12031",
    "12048",
    "12119"
    ],
    "7": "12201",
    "8": [
    "11214",
    "11502",
    "11538",
    "11677",
    "11834",
    "12120"
    ],
    "9": "11643"
    }

现在我知道这不适用于多维数组。但我也尝试过此操作：（请注意，键nr.9不是数组，然后会引发错误）

$invoice_numbers = array_unique(call_user_func_array('array_merge', $invoice_numbers), SORT_REGULAR);
return $response->withJson($invoice_numbers);

有人可以帮助我在数组中创建唯一值吗？谢谢

这是错误：警告：array_merge（）：参数8不是数组

结果为“空”

Answer 1

此代码使用array_reduce()遍历初始数组并合并各个组件。如您所见，虽然有些不是数组-所以我使用is_array($element)?$element:[$element]，如果不是数组，它将变成数组...

$invoice_numbers = array_reduce($invoice_numbers, function ($list, $element) {
    return array_merge($list, is_array($element)?$element:[$element]);
}, []);

return $response->withJson(array_unique($invoice_numbers, SORT_REGULAR));

array_unique（）不起作用-与nonArray混合

1 个答案: