插入表单时如何删除Word标记废话？

I'm building a CMS in PHP and one dread I have is that the users will have to fill the data in from existing Word (and Excel, but nevermind that) documents. Now, I've seen what happens when they carelessly copy and paste from Word to a textarea: the database got filled with crap markup.I'm building a CMS in PHP and one dread I have