Shoutbox

I'm trying to mod my blog a little, I want to add a function that automaticly adds Wikipedia links.

So when i type [[wiki]RAM] It makes it <a href="http://en.wikipedia.org/wiki/RAM">RAM</a>

And maybe even support for different languages like

[[wiki:nl]RAM] for http://nl.wikipedia.org/wiki/RAM and
[[wiki:en]RAM] for http://en.wikipedia.org/wiki/RAM

I'm not really a hero with advanced string replacers , so any help is appreciated

BTW: I also noticed that wikipedia has _ as spaces in links, maybe strip those out and make them normal spaces in the part that shows on the page.

$input = ereg_replace("\[\[wiki\]([[:alpha:]]+)\]", "<a href=\"http://www.wikipedia.org/wiki/\\1\">\\1</a>", $input);

That's your first question. With languages it is:

$input = ereg_replace("\[\[wiki:([[:alpha:]]+)\]([[:alpha:]]+)\]", "<a href=\"http://\\1.wikipedia.org/wiki/\\2\">\\2</a>", $input);

Doesn't work with me

Some how it doesn't work with _ and there are _ in a lot of links

quote:

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Originally posted by Ezra
I'm trying to mod my blog a little, I want to add a function that automaticly adds Wikipedia links.

So when i type [[wiki]RAM] It makes it <a href="http://en.wikipedia.org/wiki/RAM">RAM</a>

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Preg is better, IMO.

code:

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$string = preg_replace("/\[\[wiki\](.+)\]/i", '<a href="http://en.wikipedia.org/wiki/$1">$1</a>', $string);

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quote:

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And maybe even support for different languages like

[[wiki:nl]RAM] for http://nl.wikipedia.org/wiki/RAM and
[[wiki:en]RAM] for http://en.wikipedia.org/wiki/RAM

I'm not really a hero with advanced string replacers , so any help is appreciated

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code:

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$string = preg_replace("/\[\[wiki:([a-z]{2})\](.+)\]/i", '<a href="http://$1.wikipedia.org/wiki/$2">$2</a>', $string);

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Not sure, didn't test it. Variable name should be changed to the variable name you use for your post text.

Edit: corrected a lot of typos


Edit 2: @ WDZ => preg_ > ereg/i

Edit 3: can be quite buggy if you use many tags in the same post... cbb to fix it

Wonderfull preg_replace works with _'s

quote:

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Originally posted by Ezra
Wonderfull preg_replace works with _'s

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ereg_replace() works with them too FYI, but J-Thread didn't make his code support them. One small change would have fixed it.

Anyways, preg_replace() is indeed better.

Oh, is there also any way to remove the _ from the visible part of the link?

Err, unless you encode it which makes it %05 or something, _ look better. =p

No, that's not what I mean

I mean that it's like this

[[wiki:nl]Random_acces_memory] becomes:

<a href="http://nl.wiki.org/wiki/Random_acces_memory">Random Acces Memory</a>

code:

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function wiki_link($input) {
   $i = 0;
   $output = "";
   while($i < strlen($input)) {
      $searchfor = "[[wiki";
      if(substr($input, $i, strlen($searchfor)) == $searchfor) {
         if($input{$i+strlen($searchfor)} == ":") {
            $next = strpos($input, "]", $i);
            $lang = substr($input, $i+strlen($searchfor)+1, $next - ($i+strlen($searchfor)) - 1);
            $next2 = strpos($input, "]", $next + 1);
            $thestr = substr($input, $next + 1, $next2 - $next - 1);
            $output .= "<a href=\"http://" . $lang . ".wikipedia.org/wiki/" . $thestr . "\">" . str_replace("_", " ", $thestr) . "</a>";
            $i = $next2 + 1;
         }
         elseif($input{$i+strlen($searchfor)} == "]") {
            $next = strpos($input, "]", $i+strlen($searchfor)+1);
            $thestr = substr($input, $i+strlen($searchfor) + 1, $next - ($i+strlen($searchfor)) - 1);
            $output .= "<a href=\"http://www.wikipedia.org/wiki/" . $thestr . "\">" . str_replace("_", " ", $thestr) . "</a>";
            $i = $next + 1;
         }
         else {
            $output .= $searchfor;
            $i += strlen($searchfor);
         }
      }
      else {
         $output .= $input{$i};
         $i++;
      }
   }
   return $output;
}

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May look a bit complicated, but i don't think there is a better option, and it works so...have fun with it