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

This example would display: 20: twenty 10: ten 4: four 3: three

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