Q. Are there online encyclopedias in philosophy?

The Philosophy Resources: Electronic Reference and Electronic Databases Libguide has a list of online resources held by Hofstra. 

You can access that here: https://libguides.hofstra.edu/c.php?g=323314&p=2165888

Two major open-access scholarly online philosophy encyclopedias exist.  

1. Stanford Ecyclopedia of Philosophy: https://plato.stanford.edu/  
2. Internet Encyclopedia of Philosophy: https://iep.utm.edu/