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PHP Quiz PHP CertificatePHP uasort() Function
Example
Sort the elements of the $arr array by values using a user-defined comparison function:
<?php
function my_sort($a,$b)
{
if ($a==$b) return 0;
return ($a<$b)?-1:1;
}
$arr=array("a"=>4,"b"=>2,"c"=>8,d=>"6");
uasort($arr,"my_sort");
?>
function my_sort($a,$b)
{
if ($a==$b) return 0;
return ($a<$b)?-1:1;
}
$arr=array("a"=>4,"b"=>2,"c"=>8,d=>"6");
uasort($arr,"my_sort");
?>
Run example »
Definition and Usage
The uasort() function sorts an array by values using a user-defined comparison function.
Tip: Use the uksort() function to sort an array by keys using a user-defined comparison function.
Syntax
uasort(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
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