I have ran aptitude install php5-mysql (and restarted MySQL/Apache 2), but I am still getting this error: Fatal error: Call to undefined function mysql_connect() in /home/validate.php on line 21 phpinfo() says the /etc/php5/apache2/conf.d/pdo_mysql.ini file has been parsed. Answer Well, this is your chance! It looks like PDO is ready; use that instead. Try checking to see if the PHP MySQL