Hey Guys, I came across this article. http://net.tutsplus.com/tutorials/php/pdo-vs-mysqli-which-should-you-use/ Though I've been working with PHP for over 2 yrs, i never bothered to use the techniques mentioned in the articles like this. What i do for DB connections and queries..is just simple sql queries in php, $sql="{sql query}"; $runsql=mysql_query($sql); What i do take care is to clean the user inputs before querying the DB. Is this a good way? Coz i've seen more experienced programmers using the techniques mentioned in the article, with PDOs, MySQLi etc... I always thought there is a chance that these might slow the querying process? Please advice. Any help is appreciated. Thanks, Vinay Kannan.