[pmwiki-users] Re: Re: data from wiki page rather than file

[chr at home.se]

On Thu, 5 May 2005, Patrick R. Michaud wrote:

> > Maybe it'd be convenient for cookbook authors if there was a function that
> > they could call to extract text data from wiki pages. Maybe the function 
> > could be invoked like this:
> > 	$textArray = GetDataFromPage($page, $OptStartTag, $OptEndTag);
> > where if there are no optional tags, the entire page is returned as a
> > string in $textArray. 
> 
> Perhaps, or maybe we just publish the code idioms:

Works for me. Do we have a page somewhere for stuff like this? At first I
thought something like PmWiki/API could describe ReadPage() etc, but this
is more like an FAQ entry for cookbook authors.

	Q: How can I extract the text of a wiki page?

>     $apage = ReadPage('Group.SomeOtherPage', READPAGE_CURRENT);
>     $atext = $apage['text'];
>     # full text is in $atext
> 
> or

	Q: How can I extract text within tags from a wiki page?

>     $apage = ReadPage('Group.SomeOtherPage', READPAGE_CURRENT);
>     preg_match_all(
>         '/\\(:mytag:\\)(.*?)\\(:mytagend:\\)/i', 
>         $apage['text'],
>         $match);
>     $textArray = $match[1];
>     # extracted components are in $textArray[1]
>     foreach ($textArray[1] as $x) { echo $x, "\n"; }


> I think there could be too many variations in the formats for
> (:mytag:) and (:mytagend:) to be usefully encoded as simple
> variables.

I was actually thinking each tag could be regular expression, but that 
might not be enough (as in your example with tar arguments).

...

> So I think maybe it's better to just give "here's the base 
> code fragment" and let recipe writers customize it to suit.

Sounds good, we'll just need to document it. If we ever see that a certain 
code fragment is very frequently used, it could then be turned into a 
function.

/Christian

-- 
Christian Ridderström, +46-8-768 39 44               http://www.md.kth.se/~chr