i was wondering if anybody knows of a nice scripting language that can be embedded into php? Javascript would be favorite and although there are several attempts they are either much too shaky/slow/outdated (phpjs, j4p5) or a real pain to get up and running on shared hosts (pecl spidermonkey).
The background is: I would like to have a language that is used to control php on the server but it should also support some logic, so yaml, xml or json just isn't enough. I've looked into LUA interpreters and mediakwiki's "Winter" but they all either rely on external engines or have powerful binding whatsoever.
pecl spidermonkey binding's appears to be the most complete where you can register vars, functions and whole objects to the js-engine. Does anyone know of any system or language that might come close to what I am looking for?
best
rolf
I understand your concern. Even for trusted sources, PHP provides more access than is necessary to the whole environment of the web request. Even if the scripters are trusted and even if they can only harm themselves with a scripting error, a more constrained scripting environment would be easier for them to use and easier for you to support.
You want something that can be sandboxed off, that can only access resources you explicitly assign to its scope, and that executes in a "play within a play" runtime environment rather than in PHP's own.
One approach is to use a web templating language for user-submitted scripts. These provide a certain amount of control (variable assignment for example), and close off other options, for example you can't write an infinite loop. I've used Velocity for this purpose in Java applications; I think something like Smarty might work in PHP, but I don't have direct experience of using it for that purpose.
Another approach, if what the scripts are required to do is constrained by the domain, is to implement a Domain Specific Language (DSL). I mentioned that in this answer.
Apart from that, I don't know of any pure-PHP implementations of scripting languages. It's something I'd be interested in myself.