PHP Manual: shuffle

shuffle

(PHP 3 >= 3.0.8, PHP 4, PHP 5)

shuffle -- Shuffle an array

Description

bool shuffle ( array &array )

This function shuffles (randomizes the order of the elements in) an array.

Note: This function assigns new keys for the elements in array. It will remove any existing keys you may have assigned, rather than just reordering the keys.

Example 1. shuffle() example

<?php
$numbers = range(1, 20);
srand((float)microtime() * 1000000);
shuffle($numbers);
foreach ($numbers as $number) {
    echo "$number ";
}
?>

Note: As of PHP 4.2.0, there is no need to seed the random number generator with srand() or mt_srand() as this is now done automatically.

rsort

sizeof

Last updated: Tue, 19 Sep 2006