Nathan Nobbe wrote:
On Thu, May 8, 2008 at 3:48 PM, Matt Neimeyer <matt@xxxxxxxxxxxx> wrote:
Is there a way to tell if a function has been called that has resulted
in a call to the same function?
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...
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
said I can't think of a good way to do it without a bastardized global
variable that track "how deep" we are and there is something that
bothers me about that approach... Unless that really is the easiest
way.
you dont need a global, you can have a variable that persists throughout the
request local only to the function itself using the static keyword.
function doStuff() {
static $callCount;
if(!isset($callCount))
$callCount = 1;
else
$callCount++;
/// do stuff w/ $callCount to potentially handle sub-tabs and stuff
$callCount--;
}
-nathan
Look at the way he wants it to work. Your way would change alternate the color
each time the function is called. I think the best/easiest way to keep track of
depth will be by passing a variable in the function call itself.
--
Jim Lucas
"Some men are born to greatness, some achieve greatness,
and some have greatness thrust upon them."
Twelfth Night, Act II, Scene V
by William Shakespeare
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