ArrayIterator::uksort

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

ArrayIterator::uksortSort by keys using a user-defined comparison function

Description

public ArrayIterator::uksort(callable $callback): bool

This method sorts the elements by keys using a user-supplied comparison function.

Note:

If two members compare as equal, they retain their original order. Prior to PHP 8.0.0, their relative order in the sorted array was undefined.

Parameters

callback

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

Always returns true.

See Also

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