un-encoding HTML with PHP

[mk500]

I am trying to un-encode HTML from a bunch of data elements using smartpill and PHP. I basically have a bunch of text strings in my database which contain stuff like "Hello, thisis Bobs house." and I want to convert this data to "Hello, this is Bob's house.". I'm trying to use this PHP command:

html_entity_decode($value, ENT_QUOTES);

Unfortunately it seems to miss a lot of stuff, including "".

Anyone have any suggestions?