我有一个多维数组，看起来像这样：
Array (
[0] => Array (
[date] => August
[mozrank] => 2
[domain_authority] => 41
[external_links] => 9
[unique_visitors] => 14
)
[1] => Array (
[date] => August
[post_count] => 70
[comment_count] => 53
[theme] => yes
[plugins] => 3
)
[2] => Array (
[date] => September
[mozrank] => 4
[domain_authority] => 42
[external_links] => 10
[unique_visitors] => 20
)
[3] => Array (
[date] => September
[post_count] => 71
[comment_count] => 56
[theme] => yes
[plugins] => 5
)
)
您会注意到，有两个数组具有相同的 August 键/值对，两个数组具有相同的 9 月键/值对。但是，在每种情况下，它们都有与之关联的不同键。我正在尝试对值相同的日期键上的每个数组进行分组，并将其他键合并在一起。例如，输出将是：
Array (
[0] => Array (
[date] => August
[mozrank] => 2
[domain_authority] => 41
[external_links] => 9
[unique_visitors] => 14
[post_count] => 70
[comment_count] => 53
[theme] => yes
[plugins] => 3
)
[1] => Array (
[date] => September
[mozrank] => 4
[domain_authority] => 42
[external_links] => 10
[unique_visitors] => 20
[post_count] => 71
[comment_count] => 56
[theme] => yes
[plugins] => 5
)
)
有什么想法吗？
我想
到的第一件事：
$merged = array();
foreach ($array as $item)
{
$date = $item['date'];
if (!isset($merged[$date]))
{
$merged[$date] = array();
}
$merged[$date] = array_merge($merged[$date], $item);
}
结果将有一个数组，其中键是月份。如果你想要标准索引（从0开始），你可以始终使用shuffle()。
结果：
array (size=2)
'August' =>
array (size=9)
'date' => string 'August' (length=6)
'mozrank' => int 2
'domain_authority' => int 41
'external_links' => int 9
'unique_visitors' => int 14
'post_count' => int 70
'comment_count' => int 53
'theme' => string 'yes' (length=3)
'plugins' => int 3
'September' =>
array (size=9)
'date' => string 'September' (length=9)
'mozrank' => int 4
'domain_authority' => int 42
'external_links' => int 10
'unique_visitors' => int 20
'post_count' => int 71
'comment_count' => int 56
'theme' => string 'yes' (length=3)
'plugins' => int 5
附言我觉得它可以做得比这更好...