uksort

Description

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 function cmp ($a, $b) { if ($a == $b) return 0; return ($a > $b) ? -1 : 1; } $a = array (4 => "four", 3 => "three", 20 => "twenty", 10 => "ten"); uksort ($a, "cmp"); while (list ($key, $value) = each ($a)) { echo "$key: $value\n"; }

This example would display:

20: twenty
10: ten
4: four
3: three
      

See also: usort(), uasort(), sort(), asort(), arsort(), ksort() and rsort().