Fatal error: PHP error in file /home/netwar/www/forum.net-war.org/htdocs/lib/page/IrcChatPage.class.php (38): Function ereg_replace() is deprecated

Information:

error message: PHP error in file /home/netwar/www/forum.net-war.org/htdocs/lib/page/IrcChatPage.class.php (38): Function ereg_replace() is deprecated
error code: 0
file: /home/netwar/www/forum.net-war.org/htdocs/wcf/lib/system/WCF.class.php (255)
php version: 5.3.2-pl0-gentoo
wcf version: 1.0.10 (Horizon)
date: Thu, 09 Sep 2010 11:39:53 +0000
request: /index.php?page=IrcChat&s=7ee44e1a44b6fa2927a4a4f3e562461a96276688
referer:

Stacktrace:

#0 [internal function]: WCF::handleError(8192, 'Function ereg_r...', '/home/netwar/ww...', 38, Array)
#1 /home/netwar/www/forum.net-war.org/htdocs/lib/page/IrcChatPage.class.php(38): ereg_replace()
#2 /home/netwar/www/forum.net-war.org/htdocs/wcf/lib/page/AbstractPage.class.php(36): IrcChatPage->show()
#3 /home/netwar/www/forum.net-war.org/htdocs/wcf/lib/util/RequestHandler.class.php(63): AbstractPage->__construct()
#4 /home/netwar/www/forum.net-war.org/htdocs/wcf/lib/util/RequestHandler.class.php(91): RequestHandler->__construct('IrcChat', Array, 'page')
#5 /home/netwar/www/forum.net-war.org/htdocs/index.php(12): RequestHandler::handle(Array)
#6 {main}