PHP：合并2个数组

Question

我已经尝试了一天的以下方法，但无法正常工作。

我从分页源获取信息（在这个例子中说 3 页。所以我有 3 个数组要合并：

Array
(
    [status] => Active
    [nrEntries] => 6
    [entries] => Array
        (
            [0] => Array
                (
                    [sgname] => Merc
                    [timeentered] => 2016-02-08 04:30:00
                )

            [1] => Array
                (
                    [sgname] => bystander
                    [timeentered] => 2016-03-17 20:55:00
                )
        )
)

Array
(
    [status] => Active
    [nrEntries] => 6
    [entries] => Array
        (
            [0] => Array
                (
                    [sgname] => Elvis
                    [timeentered] => 2016-03-08 04:30:00
                )

            [1] => Array
                (
                    [sgname] => marcAR
                    [timeentered] => 2016-03-07 20:55:00
                )
        )
)

Array
(
    [status] => Active
    [nrEntries] => 6
    [entries] => Array
        (
            [0] => Array
                (
                    [sgname] => Killer
                    [timeentered] => 2016-03-09 05:30:00
                )

            [1] => Array
                (
                    [sgname] => MyName
                    [timeentered] => 2016-03-05 21:45:00
                )
        )
)

我正在寻找的结果是将它们合并为 1 个数组，结果我可以 return。

Array
(
    [status] => Active
    [nrEntries] => 6
    [entries] => Array
        (
            [0] => Array
                (
                    [sgname] => Merc
                    [timeentered] => 2016-02-08 04:30:00
                )

            [1] => Array
                (
                    [sgname] => bystander
                    [timeentered] => 2016-03-17 20:55:00
                )

            [2] => Array
                (
                    [sgname] => Elvis
                    [timeentered] => 2016-03-08 04:30:00
                )

            [3] => Array
                (
                    [sgname] => marcAR
                    [timeentered] => 2016-03-07 20:55:00
                )

            [4] => Array
                (
                    [sgname] => Killer
                    [timeentered] => 2016-03-09 05:30:00
                )

            [5] => Array
                (
                    [sgname] => MyName
                    [timeentered] => 2016-03-05 21:45:00
                )
        )
)

我运行遇到的问题是 array_merge 它不会工作，因为记录的索引号相同。

我尝试了以下方法，但这也不起作用。

<?PHP
            // add child array to the end of $result
            for ($i=0 ; $i<2; $i++) {
                $result['entries'][($page*2)+$i][] = $resultChild['entries'][$i];
            }
?>

Answer 1

试试这个：

$array1 = array(
'status' => 'Active',
'nrEntries' => 6,
'entries' => array(
    array(
        'sgname' => 'Merc',
        'timeentered' => '2016-02-08 04:30:00'
    ),
    array(
        'sgname' => 'bystander',
        'timeentered' => '2016-03-17 20:55:00'
    )
  )
);

$array2 = array(
'status' => 'Active',
'nrEntries' => 6,
'entries' => array(
    array(
        'sgname' => 'Elvis',
        'timeentered' => '2016-03-08 04:30:00'
    ),
    array(
        'sgname' => 'marcAR',
        'timeentered' => '2016-03-07 20:55:00'
    )
   )
 );

$result = array_merge_recursive($array1, $array2);
$result['status']    = array_unique($result['status'])[0];
$result['nrEntries'] = array_unique($result['nrEntries'])[0];
echo "<pre>";
print_r($result);
echo "</pre>";

这给出了以下内容：

  Array
 (
  [status] => Active
  [nrEntries] => 6
   [entries] => Array
    (
        [0] => Array
            (
                [sgname] => Merc
                [timeentered] => 2016-02-08 04:30:00
            )

        [1] => Array
            (
                [sgname] => bystander
                [timeentered] => 2016-03-17 20:55:00
            )

        [2] => Array
            (
                [sgname] => Elvis
                [timeentered] => 2016-03-08 04:30:00
            )

        [3] => Array
            (
                [sgname] => marcAR
                [timeentered] => 2016-03-07 20:55:00
            )

      )

   )

希望对您有所帮助。

Answer 2

array_merge() 不是递归的，因此它将替换整个条目数组。有一个名为 array_merge_recursive() 的函数，但它在您的情况下也不起作用，因为它将在 status 和 nrEntries 下创建包含所有数组值的数组。

你需要做的是合并'big'页数组，然后分别合并条目。这可能看起来像这样：

// Keep all pages in an array
$pages = [$pageOne, $pageTwo, $pageThree];

// Merge the page arrays
$result = array_merge(...$pages);

// Clear entries as they only contain the data from the last page
$result['entries'] = [];

// Merge entries with the entries of each page separately
foreach ($pages as $page) {
    $result['entries'] = array_merge($result['entries'], $page['entries']);
}

这是我能想到的最简单的例子。我希望它能帮助您了解正在发生的事情，以便您可以重构它以满足您的需要。

只要您的条目数组具有从 0 开始的数字键，array_merge 就会附加值而不是替换它们。

Answer 3

$a1['entries'] = array_merge_recursive($a1['entries'], $a2['entries'], $a3['entries']);

PHP：合并2个数组

PHP: Merge 2 arrays

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