# PHP数组递归排序实现方法示例

```/**
* 递归根据特定key对数组排序
* @param \$data
* @param string \$orderKey
* @param string \$sonKey
* @param int \$orderBy
* @return mixed
*/
function recursion_orderby(\$data, \$orderKey = 'order', \$sonKey = 'children', \$orderBy = SORT_ASC)
{
\$func = function (\$value) use (\$sonKey, \$orderKey, \$orderBy) {
if (isset(\$value[\$sonKey]) && is_array(\$value[\$sonKey])) {
\$value[\$sonKey] = recursion_orderby(\$value[\$sonKey], \$orderKey, \$sonKey, \$orderBy);
}
return \$value;
};
return array_orderby(array_map(\$func, \$data), \$orderKey, \$orderBy);
}
\$a = [
[
'order' => 0,
],
[
'order' => -1,
'children' => [
[
'order' => 0,
],
[
'order' => -2,
'children' => [
['order' => 0],
['order' => -1],
['order' => 1],
],
],
],
],
[
'order' => 2,
],
];
var_dump(recursion_orderby(\$a));

输出：
array(3) {
[0] =>
array(2) {
'order' =>
int(-1)
'children' =>
array(2) {
[0] =>
array(2) {
'order' =>
int(-2)
'children' =>
array(3) {
[0] =>
array(1) {
'order' =>
int(-1)
}
[1] =>
array(1) {
'order' =>
int(0)
}
[2] =>
array(1) {
'order' =>
int(1)
}
}
}
[1] =>
array(1) {
'order' =>
int(0)
}
}
}
[1] =>
array(1) {
'order' =>
int(0)
}
[2] =>
array(1) {
'order' =>
int(2)
}
}
```

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