php Failed to create COM object `com.sun.star.ServiceManager'
http://bbs.csdn.net/topics/390937994
看一下这个错误后面的具体信息，这样才好知道具体的错误原因。
比如一般是如下：
Fatal error: Uncaught exception 'com_exception' with message
'Failed to create COM object `InternetExplorer.Application': Access is denied. '
in C:\inetpub\wwwroot\trial.php:8 Stack trace: #0 C:\inetpub\wwwroot\trial.php(8): com->com('InternetExplore...') #1 {main} thrown
in C:\inetpub\wwwroot\trial.php on line 8