[pmwiki-users] Markup Extension writing

[Petko Yotov]

This seems to work for me.

I tried your code, and the {(sum)} expression on the Cookbook, with this 
markup:

   {(sum (strcount are PmWiki.BasicEditing) -6)}

The string "are" appears 16 times in my BasicEditing.

The result is correctly 16 - 6 = 10.

Definition:
$MarkupExpr['sum'] = 'array_sum($args)';
$MarkupExpr['strcount'] as below.

Petko

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On 09/02/2026 22:56, Hans Bracker wrote:
> PS: sorry, that code was not quite right. Here it is corrected:
> 
> // (strcount <needle> <HayStack>), (strcount <needle>),
> //(strcount <needle> page=<HayStack>),(strcount <needle>
> pages=<Page1,Page2,Page3>)
> $MarkupExpr['strcount'] = 'MxStringCount($pagename, @$argp)';
> function MxStringCount($pn, $argp) {
>     $find = $argp['find'] ?? $argp[''][0] ?? '';
>     if ($find=='') return '';
>     $pgs = $argp['pages'] ?? $argp['page'] ?? $argp[''][1] ?? $pn;
>     if (strpos($pgs,',')) $pages = explode(',',$pgs);
>     else $pages = array($pgs);
>     $cnt = 0;
>     foreach ($pages as  $p) {
>         $sect = strstr($p,'#');
>         $name = MakePageName($pn, $p);
>         $source = $name.$sect;
>         $text = RetrieveAuthSection($pn, $source);
>         $cnt += substr_count($text, $find);
>     }
>     return  $cnt;
> }
> 
> On 09/02/2026 21:52, Hans Bracker wrote:
> 
>> Hi Petko, I am trying to define some Markup Extensions which can be
>> embedded in other MEs for use in calculations. I just wrote one for
>> counting strings. It returns a number. But when it is inside a ME
>> like {(sum (strcount  <needle>  HaystackPage)  10 )} to add 10 to
>> count number  then this fails. The sum ME does not receive the count
>> number from ME strcount, but a keep token.
>> 
>> I can only solve this by rewriting the 'sum' ME to use $params
>> instead of $argp and add to the function at the top     $p =
>> ParseArgs(MarkupRestore($params));
>> to get the parameters without Keep token. This seems like too  much
>> code hacking in the wrong places. Is there a way that my strcount ME
>> can return the value without it being made into a token in the ME
>> process, so other MEs do not need to be hacked?