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PHP uksort() Function

❮ PHP Array Reference

Example

Sort the elements of the $arr array by keys using a user-defined comparison function:

<?php
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");
?>
Try it Yourself »

Definition and Usage

The uksort() function sorts an array by keys using a user-defined comparison function.

Tip: Use the uasort() function to sort an array by values using a user-defined comparison function.

Syntax

uksort(array, myfunction)
Parameter Description
array Required. Specifies the array to sort
myfunction Optional. A string that define a callable comparison function. The comparison function must return an integer <, =, or > than 0 if the first argument is <, =, or > than the second argument


Technical Details

Return Value: TRUE on success. FALSE on failure
PHP Version: 4+

❮ PHP Array Reference