[pmwiki-users] best practice
jo at durchholz.org
Tue May 9 12:28:51 CDT 2006
> You can probably use a static variable.
It won't live across invocations of PmWiki.
A session variable won't cut it either, because the counter must retain
its value across sessions. (That is, it must be the same counter for
visitors A and B which happen to visit the site at the same time, and it
must survive even after the session has expired.)
> You can increment a static variable as a counter, and it will
> remember its value between iterations of the php program.
That's definitely WRONG. No such beast exists inside PHP.
> function Test()
> static $a = 0;
> echo $a;
> Now, every time the Test() function is called it will print the value
> of $a and increment it.
Ah, now I see where the mixup came from. This description is incomplete.
$a will retain its value between invocations of Test() all right, but
*not from one script invocations to the next* (that is, not from one run
of pmwiki.php to the next).
> I don't know a lot about it, but from what I do know, these variables
> can be used for web page counters,
I'd be *very* suprised if that indeed worked. Web page counters usually
store their value somewhere external to PHP, e.g. in a file or in a
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