Re: Handling exit in eval

On 14 March 2011 12:14, DELiTH <tb@bytecode.se> wrote: > Richard Quadling wrote: > >> 2011/3/14 Richard Quadling <rquadling@gmail.com>: >> >> And where is my UNDO button. >> >> Essentially, having exit in the eval code is no different to having it >> in non-eval code. eval isn't a separate entity which can be >> terminated. >> >> So, code the eval code differently. >> >> If you can provide some examples, maybe we can come up with a better solution. >> >> >> > > I'm developing a kind of sandbox where you will be able to run a script > without affecting your current context. The script is loaded and parsed > which gives me the opportunity to allow or deny functions and classes > used in the script. > The only problem I have so far is the exit function which, it if is > allowed, terminates the calling script as well as the eval'ed script. > > By using a return the problem is solved as long as the user doesn't > write a function containing an exit. > > Here is a simple script thet the user might write (probably as useful as > a "Hello, world!". > > <?php > function DoSomethingOrExit($test) { >  if($test == 1) { >    exit; >  } >  return; > } > > DoSomethingOrExit(0); > echo "Hello"; > DoSomethingOrExit(1); > echo ", world!"; > exit; > echo "Bye"; > ?> > > By replacing exit with return this code will echo "Hello, world!" before > returning without echoing "Bye". > > > Another perfect solution would be if there was a way to trigger an error > within the eval'ed script that "crashes" it and returns to the calling > script. But then it just comes back to the entity-problem as you pointed > out. > > > /Thomas > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > Why not just invoke a separate instance of PHP using exec() ? Or take a look at runkit/runkit_Sandbox : http://uk.php.net/manual/en/book.runkit.php -- Richard Quadling Twitter : EE : Zend @RQuadling : e-e.com/M_248814.html : bit.ly/9O8vFY