Question

我有一个多维数组，看起来像这样

Array
(
    [0] => Array
        (
            [id] => 140309
            [headline] => Random title
            [body] => 
            [title_generic] => 
            [text_generic] => 
        )

    [1] => Array
        (
            [id] => 140309
            [headline] => Random title
            [body] => 
            [title_generic] => 
            [text_generic] => 
        )

    [2] => Array
        (
            [id] => 140309
            [headline] => Random title
            [body] => 
            [title_generic] => 
            [text_generic] => 
        )

    [3] => Array
        (
            [id] => 140309
            [headline] => Random title
            [body] => 
            [title_generic] => 
            [text_generic] => 
        )

    [4] => Array
        (
            [id] => 140309
            [headline] => Random title
            [body] => 
            [title_generic] => Random title
            [text_generic] => [b]This is Random title:[/b] 16 nov  2012
        )

    [5] => Array
        (
            [id] => 140309
            [headline] => Random title
            [body] => 
Some text goes here. Blaaaa
            [title_generic] => 
            [text_generic] => 
        )

    [6] => Array
        (
            [id] => 140309
            [headline] => Random title
            [body] => 
            [title_generic] => 
            [text_generic] => 
        )

)

我尝试使用array_unique()过滤它，但只返回

Array
    (
        [0] => Array
            (
                [id] => 140309
                [headline] => Random title
                [body] => 
                [title_generic] => 
                [text_generic] => 
            )
    )

但我想要

Array
    (
        [0] => Array
            (
                [id] => 140309
                [headline] => Random title
                [body] => 
                Some text goes here. Blaaaa
                [title_generic] => Random title
                [text_generic] => [b]This is Random title:[/b] 16 nov  2012
            )
    )

那就是只返回全部填充的唯一字段。

在数组中只有一个唯一的填充空格，所以在第一个键中我没有办法title_generic然后我会在第三个左右不同。 body和text_generic也是如此。它们在某些数组中只出现一次。但是id，标题等都是一样的（里面有日期等等）。

有没有能做这种事情的功能？

修改

我可能不太清楚。我想返回包含来自其他键（来自该键中的数组的值）的所有信息的数组，这些数据是不同的。因此，在数组的前4个键中，我使用id，headline，body，title_generic和text_generic具有相同的数组。他们有相同的ID和标题，其余的都是空的。然后在下一个键中填充title_generic和text_generic，依此类推。

我需要一个具有填充键的数组，如

Array
    (
        [0] => Array
            (
                [id] => 140309
                [headline] => Random title
                [body] => 
                Some text goes here. Blaaaa
                [title_generic] => Random title
                [text_generic] => [b]This is Random title:[/b] 16 nov  2012
            )
    )

或

Array
(
    [id] => 140309
    [headline] => Random title
    [body] => 
    Some text goes here. Blaaaa
    [title_generic] => Random title
    [text_generic] => [b]This is Random title:[/b] 16 nov  2012
)

我不知道如何更好地解释这个......

Answer 1

$result = array_reduce($array, function (array $result, array $item) {
    return array_filter($result) + $item;
}, []);

这可能会做你想要的（稍微不清楚）。

说明：它逐个浏览你的每个项目;它会过滤掉所有空值，只留下填充的键（array_filter）;然后，它会将所有不存在的密钥（+）从下一个项目添加到它（在array_reduce上阅读）。最终结果应该是一个数组，其中所有数组中的所有非空键合并为一个，其值是循环中遇到的第一个非空值。

Answer 2

我知道已有解决方案。尽管如此，我想在执行时间和相同功能方面为您提供一种轻量级方法。

# your data here
$array = [
  [
      'id' => '123',
      'headline' => 'one two three',
      'body' => 'somebody',
      'title_generic' => '',
      'text_generic' => '',
  ],
  [
      'id' => '123',
      'headline' => 'one two three',
      'body' => null,
      'title_generic' => 'title',
      'text_generic' => 'text',
  ],
];

# the aggregate to be created
$aggregate = [];

foreach ($array as $el) {
    if (empty($el)) continue;

    foreach ($el as $k => $v) {
        if (empty($v)) continue;

        if (!isset($aggregate[$k])) {
            $aggregate[$k] = $v;
        }
    }
}

# debug print
echo '<pre>';print_r($aggregate);echo '<pre>';

# the output
Array
(
    [id] => 123
    [headline] => one two three
    [body] => somebody
    [title_generic] => title
    [text_generic] => text
)

从多维数组创建唯一的数组？

2 个答案: