install 就出现这个问题

[06-Sep-2006 10:37:38] PHP Warning:  Unexpected character in input:  '\' (ASCII=92) state=1 in H:\wamp\www\discuz\upload\install.php on line 1291
[06-Sep-2006 10:37:38] PHP Parse error:  parse error, unexpected '}' in H:\wamp\www\discuz\upload\install.php on line 1294

看论坛说好像要php支持扩展库，不解，具体是哪些？