I have switched to PDT 2.0 after using 1.0. I ended up creating a new
workspace and loading all my old projects into it.
I noticed that when creating a new PHP project, a "PHP Language Library"
is added to it automatically, but there doesn't appear to be any option to
add this to an existing project. After nosing around, I found that adding
"<buildpathentry kind="con" path="org.eclipse.php.core.LANGUAGE"/>" to my
buildpath gave me what I wanted, although doing that is obviously not
ideal.
Am I missing something, or is this a feature that I might want to request?