using Mysql and PHP to store and search for keywords of a record

Hi, I am developing a database driven website that allows user to search the title and ID of a record by keywords. I want to set up a field called "keyword" in the database table to store all the keywords associated with the records, e.g. record ID record title keywords 1 a title keyword1, keyword2, keyword3, keyword4, etc. and I want to use both Mysql query and PHP to find any matches in the keywords field and return the record ID and title. What is the best data/column type in Mysql for me to store and query the keywords? What kind of method should I use to separate different keywords (e.g. use commas "," or tab "/t")? And what is the best/efficient way to search for those keywords using PHP? (I am thinking about the string compare functions and array explode functions, but I am worrying about the speed of the search because we will have more than 100 records in the table and there will be at least 5 keywords for each record.) Thanks for your help. Eager =:o3 ipeager@interchange.ubc.ca