PHP : uasort() function
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Description
The uasort() function is used to sort an array by its values using a user defined comparison function.
The function maintains the existing key index.
Version
(PHP 4 and above)
Syntax
uasort(array_name, user_defined_function)
Parameters
| Name | Description | Required / Optional |
Type |
|---|---|---|---|
| array_name | The specified array which will be sorted. | Required | Array |
| user_defined_function | User supplied function. | Required | - |
Return value
TRUE on success or FALSE on failure.
Value Type : Boolean.
Pictorial Presentation :
Example :
<?php
function my_sort($x, $y)
{
if ($x == $y) return 0;
return ($x > $y) ? -1 : 1;
}
$people = array("10" => "javascript",
"20" => "php", "60" => "vbscript",
"40" => "jsp");
uasort($people, "my_sort");
print_r ($people);
?>
Output :
Array ( [60] => vbscript [20] => php [40] => jsp [10] => javascript )
View the example in the browser
See also
