Re: Recursion... Sort of...

2008/5/8 Matt Neimeyer <matt@neimeyer.org>: > Is there a way to tell if a function has been called that has resulted > in a call to the same function? debug_backtrace() Can't comment on performance, though. Its an inelegant solution. > We have an in-house CRM app that has a function that draws a tabbed > panel on a screen... BUT if there are sub-sub-tabbed panels we want to > invert the tab colors and panel colors... > > So... > > DrawSubTab($Set) - Black on White > Content > DrawSubTab($Set) - White on Black > Content > DrawSubTab($Set) - Black on White > Content > DrawSubTab($Set) - Black on White > Content > Etc... Nested? You may be able to do this in pure CSS, without keeping a depth counter at all. > I suppose I could rewrite EVERY call to the function with a recursion > count like DrawSubTab($Set,$DepthCount+1) but that would be a MASSIVE > commit... whereas if the function can determine itself... All that It's an easy change. function DrawSubTable($Set, $DepthCount = 0) { [..] DrawSubTable($Set, $DepthCount + 1); [..] } By providing a default value, all the calls to DrawSubTable() can remain unchanged. You just have to modify its own calls to itself.