removing duplicates from array

[Anon]

my version of PHP does not include the array_unique() function or foreach. How can I remove all duplicates from an array without using these methods? Thanks!

[Anon]

for($index=0; $index<count($SubSxns); $index++){
$prev_Sxn = ($index - 1);
$prev_Sxn = $SubSxns[$prev_Sxn];
$this_Sxn = $SubSxns[$index];
if($this_Sxn != $prev_Sxn){
$SubSxn[] = $this_Sxn;
}
}