0

嗨，我有一个问题，我似乎无法找到答案。我有一个包含数组的数组，并希望根据字段的相同值将这些子数组分组。这是我的代码，允许我根据值中的数组对数组进行排序。如何根据共享值对结果进行分组？我可能不知道所有值，因为有些值是基于日期的，我想例如每天/每月分组

if($filter == "ORDER BY TODO_REF DESC"){
$type_sort = 0;
};
if($filter == "ORDER BY TODO_PRIO DESC"){
$type_sort = 2;
};
if($filter == "ORDER BY TODO_DEAD DESC"){
$type_sort = 3;
};

function aasort (&$array, $key) {
$sorter=array();
$ret=array();
reset($array);
foreach ($array as $ii => $va) {
    $sorter[$ii]=$va[$key];
}
asort($sorter);
foreach ($sorter as $ii => $va) {
    $ret[$ii]=$array[$ii];
}
$array=$ret;
}

 aasort($test_array, $type_sort);
print_r($test_array);

电流输出：

priority
Array
 (

[3] => Array
    (
        [0] => 2
        [1] => sdfsdgdfgdfgdfg
        [2] => 3
        [3] => 2013-05-30 13:53:23
    )

[2] => Array
    (
        [0] => 1
        [1] => This must also be done
        [2] => 4
        [3] => 2013-03-28 12:13:34
    )

[1] => Array
    (
        [0] => 1
        [1] => testing this show me 2
        [2] => 5
        [3] => 2029-02-23 17:27:20
    )

[0] => Array
    (
        [0] => 1
        [1] => Do this task and make sure it gets done
        [2] => 5
        [3] => 2013-06-28 12:12:41
    )

)

我想要的是这样的，它们根据子数组键 2 分成单独的数组：

Array
(
[3] => Array
    (
        [0] => 2
        [1] => sdfsdgdfgdfgdfg
        [2] => 3
        [3] => 2013-05-30 13:53:23
    )

)
Array
(
[2] => Array
    (
        [0] => 1
        [1] => This must also be done
        [2] => 4
        [3] => 2013-03-28 12:13:34
    )

)
Array
(
[1] => Array
    (
        [0] => 1
        [1] => testing this show me 2
        [2] => 5
        [3] => 2029-02-23 17:27:20
    )

[0] => Array
    (
        [0] => 1
        [1] => Do this task and make sure it gets done
        [2] => 5
        [3] => 2013-06-28 12:12:41
    )

)
4

3 回答 3

0 
$array_1 = array();
$array_2 = array();
foreach($test_array as $item) {
  if($item[0] == 1) {
    $array_1[] = $item;
  } elseif($item[0] == 2) {
    $array_2[] = $item;
  }
}
$final_array = array($array_1, $array_2);

必须有更优化的代码，但这应该可以满足您的需求。

于 2013-03-05T10:47:57.067 回答
0

array_multisort()是您所追求的，它将允许您按子数组对主数组进行排序并维护键值链接

我使用下面的方法对具有许多列和可排序列的表上的基于排序顺序箭头 asc/desc 的相当大的多维数组进行排序。它有点乱，但你应该能够遵循它。

if (strlen($_GET['col'])<1) {
                foreach ($dataarray as $key => $row) {
                    $spend[$key]  = $row[6];
                }
                array_multisort($spend, SORT_DESC, $dataarray);
            } else if ($_GET['col']=="spend"){
                foreach ($dataarray as $key => $row) {
                    $spend[$key]  = $row[3];
                }
                if ($_GET['order']=="asc") {
                    array_multisort($spend, SORT_ASC, $dataarray);
                } else {
                    array_multisort($spend, SORT_DESC, $dataarray);
                }
            } else if ($_GET['col']=="name"){
                foreach ($dataarray as $key => $row) {
                    $name[$key]  = $row[1];
                }
                if ($_GET['order']=="asc") {
                    array_multisort($name, SORT_ASC, $dataarray);
                } else {
                    array_multisort($name, SORT_DESC, $dataarray);
                }
            } else if ($_GET['col']=="avg"){
                foreach ($dataarray as $key => $row) {
                    $avg[$key]  = $row[4];
                }
                if ($_GET['order']=="asc") {
                    array_multisort($avg, SORT_ASC, $dataarray);
                } else {
                    array_multisort($avg, SORT_DESC, $dataarray);
                }
            } else if ($_GET['col']=="sites"){
                foreach ($dataarray as $key => $row) {
                    $sites[$key]  = $row[5];
                }
                if ($_GET['order']=="asc") {
                    array_multisort($sites, SORT_ASC, $dataarray);
                } else {
                    array_multisort($sites, SORT_DESC, $dataarray);
                }
            } else if ($_GET['col']=="rate"){
                foreach ($dataarray as $key => $row) {
                    $rate[$key]  = $row[6];
                }
                if ($_GET['order']=="asc") {
                    array_multisort($rate, SORT_ASC, $dataarray);
                } else {
                    array_multisort($rate, SORT_DESC, $dataarray);
                }
            } else {
                foreach ($dataarray as $key => $row) {
                    $spend[$key]  = $row[2];
                }
                array_multisort($spend, SORT_DESC, $dataarray);
            }
于 2013-03-05T10:49:23.060 回答
0
  1. 我总是推荐一个查找数组，然后是一个非常快速的调用，而不是一个if-elseif-elseif-elseif...else条件块来确定排序/分组列。isset()我发现这种语法更简洁、更易读、更易于维护。
  2. 为了使分组数据正确排序，提前对数据进行排序（虽然它仍然是更简单的形式）。 usort()与宇宙飞船操作员（php7）一起为您完成所有的工作。只需确保$groupsort使用 . 将变量传递到函数范围即可use。
  3. 在迭代输入数组时，隔离标识列值（并根据需要进行准备），然后将其用作临时键来确定$row应存储数据的组。
  4. 最后，用于array_values()删除临时标识键（如果需要）。

代码：（演示）

$filter = "ORDER BY TODO_PRIO DESC";
$lookup = [
    "ORDER BY TODO_REF DESC" => 0,
    "ORDER BY TODO_PRIO DESC" => 2,
    "ORDER BY TODO_DEAD DESC" => 3
];
$groupsort = isset($lookup[$filter]) ? $lookup[$filter] : 0;  

$array = [
    [1, "Do this task and make sure it gets done", 5, "2013-06-28 12:12:41"],
    [1, "testing this show me 2", 5, "2029-02-23 17:27:20"],
    [1, "This must also be done", 4, "2013-03-28 12:13:34"],
    [2, "sdfsdgdfgdfgdfg", 3, "2013-05-30 13:53:23"],
    [2, "Another priority", 3, "2013-03-28 11:11:11"]
];

// sort DESC on $groupsort column values
usort($array, function($a, $b)use($groupsort) { return $b[$groupsort] <=> $a[$groupsort]; }); 

// group by $groupsort column values
foreach ($array as $row) {
    $id = $row[$groupsort];                             // just to improve readability
    if ($groupsort == 3) { $id = substr($id, 0, 10); }  // remove time from datetime stamp
    $result[$id][] = $row;                              // store the current value
}

var_export(array_values($result));                      // reindex first level (remove temp keys);

输出：

array (
  0 => 
  array (
    0 => 
    array (
      0 => 1,
      1 => 'Do this task and make sure it gets done',
      2 => 5,
      3 => '2013-06-28 12:12:41',
    ),
    1 => 
    array (
      0 => 1,
      1 => 'testing this show me 2',
      2 => 5,
      3 => '2029-02-23 17:27:20',
    ),
  ),
  1 => 
  array (
    0 => 
    array (
      0 => 1,
      1 => 'This must also be done',
      2 => 4,
      3 => '2013-03-28 12:13:34',
    ),
  ),
  2 => 
  array (
    0 => 
    array (
      0 => 2,
      1 => 'sdfsdgdfgdfgdfg',
      2 => 3,
      3 => '2013-05-30 13:53:23',
    ),
    1 => 
    array (
      0 => 2,
      1 => 'Another priority',
      2 => 3,
      3 => '2013-03-28 11:11:11',
    ),
  ),
)
于 2018-08-26T13:10:22.003 回答