Php/docs/arrayiterator.uksort

• PHP Manual
• ArrayIterator
• Sort by keys using a user-defined comparison function

ArrayIterator::uksort

(PHP 5 >= 5.2.0, PHP 7)

ArrayIterator::uksort — Sort by keys using a user-defined comparison function

Description

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.

Parameters

cmp_function

The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

callback ( mixed $a, mixed $b ) : int

Return Values

No value is returned.

See Also

• ArrayIterator::ksort() - Sort array by keys
• ArrayIterator::uasort() - Sort with a user-defined comparison function and maintain index association
• uksort() - Sort an array by keys using a user-defined comparison function