pushing values from one array to another

[jowatkins]

OK, I have two arrays, one populated from a query, $listarray, and the other passed to the function from another script, $additionaloptions.

What I want to do is move through the $additionaloptions array, and if the item doesn't match any item in the $list array, push that item onto the $list array.

Does this make sense?

I've tried the following, but it keeps crashing.

if (!empty($additionaloptions)) 
{
  foreach ($additionaloptions as $extra)
{
			while ($extra = ) 
			{
					array_push ($listarray, $extra);
			}
		}
	}

[barand]

[man]array_diff[/man] should be useful here.

$temp = array_diff($additionaloptions,$listarray);

foreach($temp as $val) {
    $listarray[] = $val;
}

hth