按子数组计数对数组进行排序 [英] Sorting array by count of subarray
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问题描述
我有一个看起来像这样的数组:
I have an array looking like this:
Array(
['some_first_category'] => Array(
['some_first_name'] => Array(
[0]=>'first@email.com',
[1]=>'second@email.com',
[2]=>'third@email.com',
[3]=>'fourth@email.com' )
['some_second_name'] => Array (
[1]=>'first@email.com',
[2]=>'second@email.com')
['some_third_name'] => Array(
[1]=>'first@email.com',
[2]=>'second@email.com',
[3]=>'third@email.com',
[4]=>'fourth@email.com' )
['some_second_category'] => Array(
['some_first_name'] => Array(
[0]=>'first@email.com' )
['some_second_name'] => Array(
[1]=>'first@email.com',
[2]=>'second@email.com',
[3]=>'third@email.com',
[4]=>'fourth@email.com')
['some_third_name'] => Array(
[1]=>'first@email.com',
[2]=>'second@email.com'))
我想按具有名称的值的数量对数组进行排序，就我而言，我想成为该数组:
And I want to sort the array by the number of values of that has the names, In my case I want to become this array:
Array(
['some_first_category'] => Array(
['some_third_name'] => Array(
[1]=>'first@email.com',
[2]=>'second@email.com',
[3]=>'third@email.com',
[4]=>'fourth@email.com' )
['some_first_name'] => Array(
[0]=>'first@email.com',
[1]=>'second@email.com',
[2]=>'third@email.com',
[3]=>'fourth@email.com' )
['some_second_name'] => Array (
[1]=>'first@email.com',
[2]=>'second@email.com')
['some_second_category'] => Array(
['some_second_name'] => Array(
[1]=>'first@email.com',
[2]=>'second@email.com',
[3]=>'third@email.com',
[4]=>'fourth@email.com')
['some_third_name'] => Array(
[1]=>'first@email.com',
[2]=>'second@email.com')
['some_first_name'] => Array(
[0]=>'first@email.com' ))
这意味着按名称按名称值的数量(数量)对类别进行排序.有人可以帮我吗? 预先感谢，
This means sorting categories by name by the number(count) of values of the names. Someone can help me? Thanks in advance,
亚伦
推荐答案
您需要的只是 uasort
All you need is uasort
uasort($list, function ($a, $b) {
$a = count($a);
$b = count($b);
return ($a == $b) ? 0 : (($a < $b) ? -1 : 1);
});
完整示例
$list = Array(
'some_first_category' => Array(
'some_first_name' => Array(
0=>'first@email.com',
1=>'second@email.com',
2=>'third@email.com',
3=>'fourth@email.com' ),
'some_second_name' => Array (
1=>'first@email.com',
2=>'second@email.com'),
'some_third_name' => Array(
1=>'first@email.com',
2=>'second@email.com',
3=>'third@email.com',
4=>'fourth@email.com' )
),
'some_second_category' => Array(
'some_first_name' => Array(
0=>'first@email.com' ),
'some_second_name' => Array(
1=>'first@email.com',
2=>'second@email.com',
3=>'third@email.com',
4=>'fourth@email.com'),
'some_third_name' => Array(
1=>'first@email.com',
2=>'second@email.com'))
);
$list = array_map(function ($v) {
uasort($v, function ($a, $b) {
$a = count($a);
$b = count($b);
return ($a == $b) ? 0 : (($a < $b) ? 1 : - 1);
});
return $v;
}, $list);
print_r($list);
输出
Array
(
[some_first_category] => Array
(
[some_first_name] => Array
(
[0] => first@email.com
[1] => second@email.com
[2] => third@email.com
[3] => fourth@email.com
)
[some_third_name] => Array
(
[1] => first@email.com
[2] => second@email.com
[3] => third@email.com
[4] => fourth@email.com
)
[some_second_name] => Array
(
[1] => first@email.com
[2] => second@email.com
)
)
[some_second_category] => Array
(
[some_second_name] => Array
(
[1] => first@email.com
[2] => second@email.com
[3] => third@email.com
[4] => fourth@email.com
)
[some_third_name] => Array
(
[1] => first@email.com
[2] => second@email.com
)
[some_first_name] => Array
(
[0] => first@email.com
)
)
)
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