PHP uasort()Function
Complete PHP Array Reference Manual
Example
Sort the elements in array $arr by key value using a user-defined comparison function:
<?php
function my_sort($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
uasort() sorts an array by key value using a user-defined comparison function.
Tip:Please useuksort()the function to sort the array by key name; this function sorts using a user-defined comparison function.
Syntax
uasort(array,myfunction);
| Parameter | Description |
|---|---|
| array | Required. Specifies the array to sort. |
| myfunction | Optional. A string that defines a callable comparison function. If the first argument is <, =, > the second argument, the comparison function must return an integer <, =, > 0 respectively. |
Technical Details
| Return value: | Returns TRUE on success, or FALSE on failure. |
|---|---|
| PHP Version: | 4+ |
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