Re: how is a return values stored?

On Tue, 26 Sep 2006, Prometheus Prometheus wrote: > i was just asking myself, if it is possible, to get the return value of a > function after the function calls "return" (or throws an exception) and before > the value is returned Only through an extension. > i thought it would be a very impressive function for that purpose > for what i would need it: > think about testing a big php application > calling hundreds of functions and debugging them takes very long > but if i could track the arguments (debug_back_trace() function) AND the > return values (that's what i'm asking for) i could run a complete test and > after this i could change the input values automated and compare it with the > output i got before Xdebug (http://xdebug.org) does this with trace files storing both function/method name, parameters and return values to a file on disk. See: http://xdebug.org/docs-settings.php#auto_trace (and the 3 settings after it in the docs) > the question is: > Q1: how is the return value (return or throw) stored within php? > or another question would be: is it possible to write an extension which > can retrieve every variable set within my php session? (i know of the security > problems this produces, but until know, i'm evaluating if it can work) and > would be the return value within this variables? > any hint on this would be great! > since it's possible to create a sandbox within php (runkit extension) i think > it should be possible to get the return value (or exception object) before the > calling function receives it, not? Yes, this is possible with an extension. You would need to reimplement the zend_execute function. Again, you can find on how to do that in the Xdebug sources. > Q2: maybe i didn't find it, but is there a finished php function which i can > use like debug_back_trace but for the return value? There is none. regards, Derick