根据三级数组值"count"对三级多维数组进行排序的正常过程是什么。在这个数组中，计数可以是1,2,3,4,5，依此类推。如何执行并使较大的计数数组数据集按第一级数组索引排序到开头。
基本上，如果一个数组记录的"count"中有一个较大的数字，就让它按降序排列在数组的开头。
（如果1条记录包含计数1、2、3，则使用最大计数作为排序的决策变量）
样本多维数组看起来像
Array
(
[174] => Array
(
[28] => Array
(
[index] => 28
[draw] => 1
[date] => 12-05-2036
[value_a_key] => 7
[value_b_key] => 2
[value_c_key] => 4
[value_a] => 1
[value_b] => 5
[value_c] => 12
[count] => 1
)
)
[175] => Array
(
[19] => Array
(
[index] => 19
[draw] => 10
[date] => 12-05-2027
[value_a_key] => 2
[value_b_key] => 4
[value_c_key] => 3
[value_a] => 1
[value_b] => 5
[value_c] => 13
[count] => 1
)
[26] => Array
(
[index] => 26
[draw] => 3
[date] => 12-05-2034
[value_a_key] => 5
[value_b_key] => 4
[value_c_key] => 2
[value_a] => 1
[value_b] => 5
[value_c] => 13
[count] => 2
)
[28] => Array
(
[index] => 28
[draw] => 1
[date] => 12-05-2036
[value_a_key] => 7
[value_b_key] => 2
[value_c_key] => 5
[value_a] => 1
[value_b] => 5
[value_c] => 13
[count] => 3
)
)
[178] => Array
(
[19] => Array
(
[index] => 19
[draw] => 10
[date] => 12-05-2027
[value_a_key] => 2
[value_b_key] => 4
[value_c_key] => 7
[value_a] => 1
[value_b] => 5
[value_c] => 16
[count] => 1
)
)
这应该适用于从低计数到高计数的排序。如果你想把最后一句话的最后一个否定换成另一个否定。
usort($array, function ($x, $y) {
// Set highest count to 0 for both arrays
$highestCountForX = 0;
$highestCountForY = 0;
// Loop through first array to check
foreach ($x as $secondLevelX) {
if ($secondLevelX['count'] > $highestCountForX) {
$highestCountForX = $secondLevelX['count'];
}
}
// Loop through second array to check
foreach ($y as $secondLevelY) {
if ($secondLevelY['count'] > $highestCountForY) {
$highestCountForY = $secondLevelY['count'];
}
}
if ($highestCountForX === $highestCountForY) {
return 0;
}
return ($highestCountForX < $highestCountForY) ? -1 : 1;
});
如果我理解正确，您希望根据每条记录的总数进行排序，因此在您的示例中，记录#175的总数为6，应该在列表中排名第一。
您可以使用usort执行此操作，但它会覆盖数组键，因此我使用multisort并对键和值进行排序：
$counts = array();
$keys = array_keys($arr);
foreach ($arr as $key => $value){
$total = 0;
foreach ($value as $key2 => $value2){
$total -= $value2['count'];
}
$counts[] = $total;//it's actually negative totals to sort in descending order
}
$counts_copy = $counts;//array_multisort will rearrange, so we need a copy
array_multisort($counts, $arr);
array_multisort($counts_copy, $keys);
$out = array_combine($keys, $arr);
print_r($out);