Re: Anyone who can help me making a loop of this?
| From: | Richard Lynch | Date: | Fri, 26 Jan 2001 10:46:46 +0000 |
| Subject: | Re: Anyone who can help me making a loop of this? | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-36767@lists.php.net to get a copy of this message | ||
The "easiest" way to do that kind of output is "recursion"
It's a kind of iteration/looping thing where a function calls itself.
Sample:
function fact($x){
if ($x == 0){
return 1;
}
else{
return $x * fact($x - 1);
}
}
Basically the function eats itself rather like those Russion porcelain dolls
nestled inside each other.
It's easier to "reverse" your data structure to get it to work though:
$tingtang[0] = array(1, 7);
$tingtang[1] = array(2, 4);
$tingtang[2] = array(3);
.
.
.
IE, each tingtang knows its "children", rather than the parent.
In your case it would be something like:
function tingtang($tt, $depth = 0){
global $tingtang;
echo str_repeat(" ", $depth * 4), "tingtang$tt<BR>\n";
while (list(,$child) = each($tingtang[$tt])){
tingtang($child, $depth+1);
}
}
tingtang(0);
Note: Recursion has an overhead at each function call -- So very "deep"
trees can become performance problems.
For a much more in-depth look at this sort of thing, check out the rather
long threads about "forums" and "recursion" in the PHP Mailing List
archives. (Probably back in version 3 archives, actually)
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----- Original Message -----
From: Christian Sakshaug <christian@sakshaug.net>
Newsgroups: php.general
Sent: Thursday, January 25, 2001 12:34 PM
Subject: [PHP] Anyone who can help me making a loop of this?
> Anyone who can help me making a loop of this?
> http://www.sakshaug.net/phps/loop.txt
>
> I have tried many things, but I can't get it perfect...
>
>
>
>
>
> Best Regards, Christian Sakshaug
> --
> Email: christian@sakshaug.net
> Web: www.sakshaug.net
> Tel: +47 913 95 618
>
>
>
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