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PHP usort() Function

< PHP Array Reference

Example

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

<?php
function my_sort($a,$b)
{
if ($a==$b) return 0;
return ($a<$b)?-1:1;
}

$a=array(4,2,8,6);
usort($a,"my_sort");
?>

Definition and Usage

The usort() function sorts an array using a user-defined comparison function.

Syntax

usort(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