Embedded Javascript interpreter for php

Is the开发者_如何学Gore some api available for embedding javascript in php - something similar to Jint for .NET.

I would like to allow user to customize workflow by being able to access limited php classes and methods that can be run at server-side.

User writes a code block that gets executed later... for example, js/ecma script code like ...

if (Contact.Age < 12){
  Contact.setEligibility = false;
}
else{
  Contact.setEligibility = true;
}

There's a pseudo-Javascript interpreter called 'phpjs' (php functions implemented in javascript), which I happen to know about. And a fully syntax compatible JS interpreter (written in pure PHP) called Javascript for PHP5: http://j4p5.sourceforge.net/ - implements the JS language, not the DOM or much functions.

If you want a full-fledged and "real" Javascript runtime, then there is a PECL extension for that. http://pecl.php.net/package/spidermonkey (requires custom compiling PHP interpreter).