PHP uasort() Function

In this chapter you will learn:

1. Definition for PHP uasort() Function
2. Syntax for PHP uasort() Function
3. Parameter for PHP uasort() Function
4. Example - PHP uasort() Function

Definition

The uasort() function sorts an array by values using a user-defined comparison function.

Syntax

PHP uasort() Function has the following syntax.

Parameter

myfunction must return an integer <, =, or > than 0 if the first argument is <, =, or > than the second argument.

Example

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

<?php//j ava 2  s .  c o  m
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");
?>

Next chapter...

What you will learn in the next chapter:

1. Definition for PHP uksort() Function
2. Syntax for PHP uksort() Function
3. Parameter for PHP uksort() Function
4. Example for PHP uksort() Function

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