My server crashed due to 40 gigs of the following error in the error log, anyone knows what caused this and how to correct the issue? thanks.


from error log:

Wed May 16 21:43:31 2012] [error] [client 98.14.12.23] PHP Notice:  Undefined index: sec in /var/www/vhosts/phatapples.com/httpdocs/pdd.php on line 5, referer: http://www.facebook.com/
[Wed May 16 21:43:32 2012] [error] [client 72.39.163.169] PHP Notice:  Undefined index: sec in /var/www/vhosts/phatapples.com/httpdocs/pdd.php on line 5, referer: http://m.facebook.com/l.php?u=http%3A%2 … =SAQFpBGre
[Wed May 16 21:43:32 2012] [error] [client 98.14.12.23] PHP Warning:  DirectorUtils::decode(): Cannot assign to an array of nodes (duplicate subnodes or attr detected) in /var/www/vhosts/phatapples.com/httpdocs/classes/Utils.php on line 48, referer: http://www.facebook.com/
[Wed May 16 21:43:32 2012] [error] [client 98.14.12.23] PHP Warning:  DirectorUtils::decode(): Cannot assign to an array of nodes (duplicate subnodes or attr detected) in /var/www/vhosts/phatapples.com/httpdocs/classes/Utils.php on line 48, referer: http://www.facebook.com/
[Wed May 16 21:43:32 2012] [error] [client 98.14.12.23] PHP Warning:  DirectorUtils::decode(): Cannot assign to an array of nodes (duplicate subnodes or attr detected) in /var/www/vhosts/phatapples.com/httpdocs/classes/Utils.php on line 48, referer: http://www.facebook.com/
--etc....----