Entity 'nbsp' not defined

PHP: XSL関数 - Manual

In response to appletalk at gmail dot com

As many of you may have noticed, DOM parser gives errors if the ' ' entity is present. The E_WARN message looks like:
Warning: DOMDocument::load() [function.load]: Entity 'nbsp' not defined in ...
There're many ways to solve this:
.....
b) Defining  
At the top of the document, after the definition, add:
�� ��
�� ]>
.......
Just wanted to let people know that option b does NOT work. I'm not sure why this isn't implemented correctly, but it isn't, so don't waste your time. It's unfortunate the DOMXSL transform is so much less capable than the old xslt function.