PHP uksort() Function
Definition
The uksort() function sorts an array by keys using a user-defined comparison function.
Syntax
PHP uksort() Function has the following syntax.
uksort(array,myfunction);Parameter
| Parameter | Is Required | Description |
|---|---|---|
| array | Required. | Array to sort |
| myfunction | Optional. | Name of the comparison function. |
myfunction must return an integer <, =, or > than 0 if the first argument is <, =, or > than the second argument.
Example
Sort the elements of the $arr array by keys using a user-defined comparison function:
<?php//w w w . j av a2s. c o m
function my_sort($a,$b){
if ($a==$b) {
return 0;
}
return ($a<$b)?-1:1;
}
$arr=array("a"=>4,"b"=>2,"c"=>8,"d"=>"6");
uksort($arr,"my_sort");
?>