How about allowing for metaPasses within the castle? Am sure this topic
came up, what's the conclusion?
Philip
On Thu, 18 Jan 2001, Rasmus Lerdorf wrote:
> > I'm a bit troubled with the fact that variables declared at the top of your
> > script are not then global to functions within that script. That in order
> > to see that variable within a function you'd have to declare it as global in
> > the function (understanding that the variable could have been set at the top
> > of the script). This seems extremely backwards to me (me being a VB guy).
> >
> > Would someone kindly shine the light down upon me with an explanation of
> > this logic? And why can't I possibly declare the variable as Global at the
> > top of my script?
>
> Once upon a time in a cold land far far away, a brave programming team was
> building a castle. The castle was large and complex with countless rooms
> and secret passageways. On one frightful day the team got stuck. They
> had built one too many rooms with one too many secret passageways and
> suddenly the castle was beginning to crumble. A desperate plea went out
> to the local wizard who was strong and powerful. The local wizard looked
> at the problem, saw the many rooms and the many secret passageways and
> gave the following decree: "Thou must post a sign in each and every room
> declaring which secret passageways connect to this room." The brave
> programming team feared the wizard and implemented the decree immediately
> although they really didn't understand how it would help. What they found
> was that a number of secret passageways did not connect to anything and
> others connected to places that didn't make any sense. After fixing these
> the castle was solid again.
>
> The moral of this tale is that one must declare ones' global variables
> that one intends to use within a function. In languages like C where this
> is not required one can end up with all sorts of weird side effects when a
> function changes a variable that the programmer intended to be local to
> the function and it affects code elsewhere in the system. This is almost
> impossible to track down. The tale of the brave programming team led to
> this being a requirement in PHP.
>
> -Rasmus
>
>
>
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