使用其他数组的值创建新数组

Question

我有一个包含单个数组(从db中提取)的数组，其内容类似于以下内容：

Array
(
[0] => Array
    (
        [date] => 2014-11
        [time] => 2135
        [name] => John
    )

[1] => Array
    (
        [date] => 2014-11
        [time] => 5496
        [name] => Adam
    )

[2] => Array
    (
        [date] => 2014-12
        [time] => 1526
        [name] => John
    )

[3] => Array
    (
        [date] => 2014-12
        [time] => 5481
        [name] => Adam
    )
[4] => Array
    (
        [date] => 2014-12
        [time] => 3476
        [name] => Lizzie
    )
)

我想要做的是在前一个数组的基础上构建一个新的多维数组，其中数组与同月的数组以以下方式连接在一起：

Array
(
[0] => Array
    (
        [date] => 2014-11
        [John] => 2135
        [Adam] => 5496
    )

[1] => Array
    (
        [date] => 2014-12
        [John] => 1526
        [Adam] => 5481
        [Lizzie] => 3476
    )
)

我试着看过各种各样的数组函数，但根本无法了解如何实现这一点.

Answer 1

看看下面的片段。

$output = array(); // Where the output will be saved

foreach ($input as $row) { // Need to process the original input array

    $date = $row['date']; // Grouping by the date value, thus we use it as an index in an associative array

    if (empty($output[$date])) {
        $output[$date] = array('date' => $date); // Make sure the 'date' value is in the final output
    }

    $output[$date][$row['name']] = $row['time']; // Actual values, e.g., [Adam] => 5496
} 

$output = array_values($output); // Removing original indexes from the associative array

问题中想要的数组结构有点奇怪，但没有问题。