1. http://www.cnblogs.com/yuanke/p/4973824.html
在php.ini中
a. com.allow_dcom = true
b. extension=php_com_dotnet.dll
2. https://stackoverflow.com/questions/12104775/cant-open-word-doc-with-com-in-php/12105160#12105160
（如果有问题，去看它的回答，有另一种方法 ）
- Execute "dcomcnfg"
- Open Component Services > Computers > My Computer > DCOM Config
- Search for Microsoft Office Word 97-2003 Document (it will be something like this translated to your language, so take a while and search for it)
- Right-Click on it and open the properties
- Choose "Identity" tab
- Normally this is set to "the launching user". You have to change this to "the interactive user" or a admin user of your choice.
- Apply these new settings and test your COM application. It should work fine now.
原文：http://www.cnblogs.com/turtlegood/p/7105048.html