I just installed VS 2017 Pro 15.9.13 with PHP Tools 1.30.11233 and I noticed that bookmarks do not work for PHP Projects. I did some digging, and it appear that bookmark data gets stored in
When I watched the file contents, it appeared that the bookmarks I was saving were being written into the file. However, when launching VS again, the bookmarks do not get loaded.
I checked with a different project type (C#) and the stored bookmarks load correctly when starting VS, so I think this is an issue in PHP Tools.