Question

我想根据列的匹配值合并两个数组。这是我的2个阵列。

$array1 = array(2) {
   [0] => array(2) {
      ["total_process_per_category"] => string(2) "6"
      ["category_id"] => string(1) "1"
   }
   [1] => array(2) {
      ["total_process_per_category"] => string(1) "2"
      ["category_id"] => string(1) "2"
   }
}

$array2 = array(2) {
   [0] => array(2) {
      ["total_pinned_per_category"] => string(2) "16"
      ["category_id"] => string(1) "1"
   }
   [1] => array(2) {
      ["total_pinned_per_category"] => string(1) "4"
      ["category_id"] => string(1) "2"
   }
}

我想用这两个阵列获得的是这样的。

array(2) {
   [0] => array(3) {
      ["total_process_per_category"] => string(2) "6"
      ["total_pinned_per_category"] => string(2) "16"
      ["category_id"] => string(1) "1"
   }
   [1] => array(3) {
      ["total_process_per_category"] => string(2) "2"
      ["total_pinned_per_category"] => string(1) "4"
      ["category_id"] => string(1) "2"
   }
}

你可以看到两个数组具有相同的键[＆＃39; category_id＆＃39;]并且具有相同的值。

所以我想要完成的是将[＆＃39; total_process_per_category＆＃39;]和[＆＃39; total_pinned_per_category＆＃39;]放在他们[＆＃39; CATEGORY_ID＆＃39;。]

我使用嵌套的foreach得到了这个。但它对我来说看起来很难看。那么有什么建议吗？

Answer 1

您可以尝试array_reduce：

$someVariable = 'someValue';
$result = array_reduce(array_merge($array1, $array2), function ($carry, $item) use ($someVariable) {
    if (isset($carry[$item['category_id']])) {
        $carry[$item['category_id']] = array_merge($carry[$item['category_id']], $item);
    } else {
        $carry[$item['category_id']] = $item;
    }
    return $carry;
}, array());

var_dump($result);

Answer 2

您想要类似的东西吗？

foreach ( $array1 as $index => $value ) {
    $mergeArray[] = [ $value, $array2[$index]];
}

根据PHP中的匹配列值合并数组

2 个答案: