Sort array into alternating smallest largest values?

Does anyone know how to sort an array into alternating smallest largest values?

I.E.

Array (10, 2, 5, 1, 30, 1, 7)

Should be :

(30, 1, 10, 1, 7, 2, 5)

EDIT:

Forgot to mention the arrays are associative, so:

Array("A"=>10, "B"=>2, "C"=>5, "D"=>1, "E"=>30, "F"=>1, "G"=>7)

Should become:

("E"=>30, "D"=>1, "A"=>10, "F"=>1, "G"=>7, "B"=>2, "C"=>5)

Answer

Sort your array then push elements from beginning and end of the array alternatively:

<?php

    $myArray = array(10, 2, 5, 1, 30, 1, 7);
    sort($myArray );
    $count=sizeof($myArray );

    $result= array();
    
    for($counter=0; $counter * 2 < $count; $counter++){

         array_push($result, $myArray[$count - $counter - 1]);
         //check if same elements (when the count is odd)
         if ($counter != $count - $counter - 1) {
             array_push($result, $myArray[$counter]);
         }

    }
    print_r ($result);

?>

returns:

Array ( [0] => 30 [1] => 1 [2] => 10 [3] => 1 [4] => 7 [5] => 2 [6] => 5 )