<?php

$nums = array(15, 2.2, -4, 2.3, 0);
asort($nums);
printf("

%s

\n", var_export($nums, TRUE));
ksort($nums);
printf("

%s

\n", var_export($nums, TRUE));
?>

Here is another tutorial using krsort to sort an associative array

<?php
$dogs = array('Lassie' => 'Collie', 'Bud' => 'Sheepdog', 'Rin-Tin-Tin' => 'Alsatian', 'Snoopy' => 'Beagle');
krsort($dogs);
printf("<pre>%s</pre>\n", var_export($dogs, TRUE));
?>

Here is a tutorial about shuffling arrays

<?php
$nums = array(15, 2.2, -4, 17, 2.9, 0, 14);

shuffle($nums); //shuffles the array in random order
printf("<pre>%s</pre>\n", var_export($nums, TRUE));

shuffle($nums);
printf("<pre>%s</pre>\n", var_export($nums, TRUE));

shuffle($<

%s<

\n", var_export($nums, TRUE));
?>