Something strange happened today, Zend Studio 9 trial made me select the workspace again (it was htdocs but it showed workspace, so I set it back to htdocs), all of my projects were gone, I had to re-create them, and now it's giving a validation error on all built-in PHP functions: "Call to undefined function". I read that the .buildpath file has to contain some code but it does contain the code. It also appears some of my settings were reset. This didn't happen when I initially installed Zend Studio and I'm not sure how to fix it. Please someone let me know what to do.