I get the next type of errors extremely fast and i'm not able to spread out up my plesk user interface. My disk space has become full at very constant speed. Now i'm not able to spread out up my ftp also. The disk space is quickly being occupied with error log files.

Fundamental essentials error messages I get. Can anybody please consider this..

[root@host353218 ~]# grep -Hr 94.233.235.239 /var/www/vhosts/playtoongames.com/statistics/logs/error_log | grep 09:12
/var/www/vhosts/playtoongames.com/statistics/logs/error_log:[Mon Jun 06 09:12:22 2011] [error] [client 94.233.235.239] PHP Notice:  Use of undefined constant LOGIN_TITLE - assumed 'LOGIN_TITLE' in /var/www/vhosts/playtoongames.com/httpdocs/lang/en.php on line 4, referer: http://www.playtoongames.com/categories/5/
/var/www/vhosts/playtoongames.com/statistics/logs/error_log:[Mon Jun 06 09:12:22 2011] [error] [client 94.233.235.239]

Regards.

You're utilizing a constant named LOGIN_TITLE in "httpdocs/lang/en.php", that's not defined before. It ought to be whether string (encapsed in quotes 'LOGIN_TITLE'), or else you should define it before.

Update:

How to define a constant in PHP.

define('LOGIN_TITLE', 'Sign in');

The very first argument may be the title from the constant like a string, less a continuing itself. The quotes ' are needed.