Question

我有一些数组，我想将它们合并为一个，只使用一次，这是我的数组：

["ar1"]
["ar2"]
["ar2"]
["ar3"]
["ar4","ar2","ar5"]
["ar6","ar1"]
["ar5","ar3","ar7"]
["ar8","ar9","ar7"]
["ar3"]

我希望它返回：

AR1，AR2，AR3，AR4，AR5，AR6，AR7，AR8，AR9

在PHP中有一种简单的方法吗？

Answer 1

这是你可以做到的：

$input = [
  ["ar1"],
  ["ar2"],
  ["ar2"],
  ["ar3"],
  ["ar4","ar2","ar5"],
  ["ar6","ar1"],
  ["ar5","ar3","ar7"],
  ["ar8","ar9","ar7"],
  ["ar3"],
];

if ($input) {
  $merged = call_user_func_array('array_merge', $input);
  $unique = array_unique($merged);
  $final = array_values($unique);
} else {
  $final = [];
}

print_r($final);

输出看起来像这样：

Array
(
    [0] => ar1
    [1] => ar2
    [2] => ar3
    [3] => ar4
    [4] => ar5
    [5] => ar6
    [6] => ar7
    [7] => ar8
    [8] => ar9
)

一些笔记重新编码：

$merged - 这基本上将输入数组中的所有项合并为单个数组。当零输入数组时，我们需要if来处理琐碎的情况（在这种情况下array_merge将失败）。

$unique - 此处我们删除所有重复项。

$final - 但array_unique也使用数组键（而不是0,1,2，你可以得到5,7,12，即非连续索引），所以，我们应该整理钥匙。这是可选步骤，具体取决于您可能跳过它的任务。如果跳过此步骤（查看键），输出的外观如下：

Array
(
    [0] => ar1
    [1] => ar2
    [3] => ar3
    [4] => ar4
    [6] => ar5
    [7] => ar6
    [11] => ar7
    [12] => ar8
    [13] => ar9
)

组合阵列并制作独特的变量

1 个答案: