提问人：Ben 提问时间：5/14/2016 最后编辑：mickmackusaBen 更新时间：9/15/2022 访问量：60
将索引数组的关联数组转置为关联数组的索引数组 [duplicate]
Transpose associative array of indexed arrays to be indexed array of associative arrays [duplicate]
问：
我需要转换从表单提交中获取的PHP数组，以便我可以在数据库中更有用地使用它。
Array
(
[first_name] => Array
(
[0] => Ben
[1] => Tom
[2] => Sarah
)
[last_name] => Array
(
[0] => Wills
[1] => Main
[2] => Bliss
)
[email] => Array
(
[0] => [email protected]
[1] => [email protected]
[2] => [email protected]
)
)
自：
Array
(
[0] => Array
(
[first_name] => Ben
[last_name] => Wills
[email] => [email protected]
)
[1] => Array
(
[first_name] => Tom
[last_name] => Main
[email] => [email protected]
)
[2] => Array
(
[first_name] => Sarah
[last_name] => Bliss
[email] => [email protected]
)
)
如何更改值的键路径，以便交换第一级键和第二级键？
答：
1赞
Ravinder Reddy
5/14/2016
#1
使用以下代码。希望至少这能给人一些想法，如何进行:)
$array = array(
'first_name' => array('Ben','Tom','Sarah'),
'last_name' => array('Wills','Main','Bliss'),
'email' => array('[email protected]','[email protected]','[email protected]')
);
// loop the array
foreach($array as $key=>$value){
foreach($value as $k=>$v){
// use the first loop key here
$new_array[$k][$key] = $v;
}
}
print_r($new_array);
输出：
Array
(
[0] => Array
(
[first_name] => Ben
[last_name] => Wills
[email] => [email protected]
)
[1] => Array
(
[first_name] => Tom
[last_name] => Main
[email] => [email protected]
)
[2] => Array
(
[first_name] => Sarah
[last_name] => Bliss
[email] => [email protected]
)
)
2赞
RomanPerekhrest
5/14/2016
#2
使用 、 、 和 函数的解决方案：array_keysarray_valuesarray_mapcall_user_func_arrayarray_combine
$keys = array_keys($arr); // supposing $arr is your initial array
$data = call_user_func_array("array_map", array_merge([null], array_values($arr)));
$result = array_map(function($v) use($keys){
return array_combine($keys, $v);
}, $data);
print_r($result);
输出：
Array
(
[0] => Array
(
[first_name] => Ben
[last_name] => Wills
[email] => [email protected]
)
[1] => Array
(
[first_name] => Tom
[last_name] => Main
[email] => [email protected]
)
[2] => Array
(
[first_name] => Sarah
[last_name] => Bliss
[email] => [email protected]
)
)
评论
0赞
Mark Baker
5/14/2016
不错的解决方案;我看了转调，但想不出如何恢复关联键
0赞
RomanPerekhrest
5/14/2016
@MarkBaker，我想起了那个有趣的功能：“......构造一个数组的数组，通过使用 NULL 作为回调函数的名称，可以很容易地执行“，这就是”事物”array_map
0赞
Mark Baker
5/14/2016
#3
使用 PHP 的 MultipleIterator 可以很容易地在保留键名的同时进行转换
$data = array(
'first_name' => array(
0 => 'Ben',
1 => 'Tom',
2 => 'Sarah',
),
'last_name' => array(
0 => 'Wills',
1 => 'Main',
2 => 'Bliss',
),
'email' => array(
0 => '[email protected]',
1 => '[email protected]',
2 => '[email protected]',
),
);
$mi = new MultipleIterator(MultipleIterator::MIT_NEED_ALL | MultipleIterator::MIT_KEYS_ASSOC);
foreach($data as $key => $column) {
$mi->attachIterator(new ArrayIterator($column), $key);
}
$newData = [];
foreach($mi as $row) {
$newData[] = $row;
}
var_dump($newData);
评论