如何忽略PHP文件中的eclipse错误

I get 600 warnings in eclipse for various attributes.

Attribute (cellpadding) is obsolete. 
Its use is discouraged in HTML5 documents.  meta-boxes.php  
/project/wp-admin/includes  line 1142   HTML Problem

I have been to

Settings/Preferences/Web/Html Files/Validation

I have set everything to ignore, and added the attributes? Is this a bug?

Not really a solution, but using the Aptana Studio plugin will not complain about cellpadding.