I am really sorry not to include the code of the opendb() function. What the function does is opening a connection to the database. I am including the code below, in case you face any more problem please let me know.
Code: php
function opendb()
{
global $server,$user,$pass,$db;
mysql_connect($server,$user,$pass);
mysql_select_db($db);
}
function closedb()
{
mysql_close();
}