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PHP uasort() Function

PHP Array Reference PHP Array Reference

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");
?>

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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+

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