hello, I am using PHP to connect to postgresql server. Till now it was working fine and PHP was connecting sql server without any problems. Suddenly today i am getting an error or warning which says 'Warning: Unable to connect to PostgresSQL server: connectDBStart() -- unknown hostname: localhost in /var/www/html/phpfiles/others/othersbrowse.php on line 20 Warning: Supplied argument is not a valid PostgreSQL link resource in /var/www/html/phpfiles/others/othersbrowse.php on line 25 ERROR IN EXECUTION' I am not getting what the problem was. Beform some times it used to come but when i restarted the system it used to work fine. Pls anybody tell me what the problem is and any suggestions pls since the server has to run all the 24 hours and 365 days. thanks in advance Arun