Kevin van Zonneveld has pointed out that the project PHP.JS (porting PHP functions over to Javascript) has a new home:

PHP.JS is an open source project trying to port PHP functions to JavaScript. We've been around for a little while on my blog at http://kevin.vanzonneveld.net/, but have worked really hard and now moved to a dedicated site at http://phpjs.org. We've also created a 'compiler' that let's you generate a custom php.js library with only PHP functions you need. You can save that configuration & upgrade your library regularly online.

They currently have almost 400 functions converted with more being added all the time. Check out the project's new site for full details.