uksort
(PHP 3>= 3.0.4, PHP 4 )
uksort -- Sort an array by keys using a user-defined comparison function
Description
void
uksort ( array array, callback 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 <?php
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(), natsort(), and rsort().
