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"; } ?>
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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().