How do I remove duplicates from an ARRAY?

[pzed1]

The following code produces a series of 18 two digit numbers.

Problem is, I dont want any duplicates in the series of numbers it creates. How can I modify this code to do this?

$form_amount = "18";
$form_low = "1";
$form_high = "59";


for ($i=0;$i < $form_amount; $i++) {$numberset[] =  rand ($form_low, $form_high);}

Remember, I still want 18 numbers just different numbers. form_low and form_high is the range of numbers

[gid]

Store the already picked values in an array, and on a duplicate, decrement your counter and issue a "continue;" to start your loop over again.