I'm having difficulty in trying to figure out a way to loop through a query
and extract the info from a single column into an array. Here is what I am
looking for. In the table, I have a column called keywords that has a
string of information that are separated with a comma. I am looking for a
way to extract each keyword from the one cell and make a conditional on it.
Otherwise its like this:

Column keywords has in a single cell - TV,television,HDTV,projection
I want to loop through each row cell in the column keywords and write out
each keyword to its own placement to be compared to what the user submits.
I was thinking of something like this but this is as far as I've gotten.

$search_string = $_POST["search"];
$search_string = strip_tags($search_string);
$search_string = strtolower($search_string);
$search_string = str_replace("\n", "", $search_string);
$search_string = strip_chars($search_string); //calls a formula which strips
specific chars
$search_string = str_replace(",", "", $search_string);
$search_string = explode(" ", $search_string);
$search_string = strip_words($search_string); //calls a formula which strips
specific words

$keywords = mssql_query("select keywords from category");

for ($i=0; i < mssql_num_rows($keywords); $i++) {

$keywords = mssql_result($keywords,0,"keywords"); //this will assign
the full string to the variable keywords

if ($keywords == $search_string){
echo ("keyword $keywords found");
}
}

I can't figure out how to separate each keyword by the comma and then write
that specific keyword to an array to be used. Any and all help would be
appreciated.

thanks