ArrayIterator::uksort()
(PHP 5>=5.2.0,PHP 7)
Sort by keys using a user-defined comparison function
说明
public ArrayIterator::uksort(callable $cmp_function) : void
This method sorts the elements by keys using a user-supplied comparison function.
Note:If two members compare as equal,their relative order in the sorted array is undefined.
参数
- $cmp_function
在第一个参数小于，等于或大于第二个参数时，该比较函数必须相应地返回一个小于，等于或大于0的整数。
callback(mixed $a,mixed $b) : int
返回值
没有返回值。
参见
- ArrayIterator::ksort() Sort array by keys
- ArrayIterator::uasort() Sort with a user-defined comparison function and maintain index association
uksort()使用用户自定义的比较函数对数组中的键名进行排序