(PHP 3>= 3.0.4, PHP 4 >= 4.0.0)
uksort -- Sort an array by keys using a user-defined comparison functionvoid uksort (array array, function cmp_function)
This function will sort the keys of an array using a user-supplied comparison function. If the array you wish to sort needs to be sorted by some non-trivial criteria, you should use this function.
Example 1. uksort() example
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This example would display:
20: twenty
10: ten
4: four
3: three
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See also: usort(), uasort(), sort(), asort(), arsort(), ksort(), natsort() and rsort().