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Es tan simple y tan bueno y lo utilizo tan amenudo que he tenido que poner el fuente de este Plug-in para uso y disfrute del personal que utilice WordPress.

Ni está mantenido, ni esta en Codex de WordPress ni nada de nada, si alguien lo quiere adoptar....

pos ale 🙂

 < ?php
Plugin Name: Wikipedia Link
Plugin URI:
Description: With this plugin, you can link to Wikipedia entries just like within Wikipedia by simply enclosing the word you want to link with  and , or optionally separate the linked word from the caption with |. Examples: knives, Austria
Version: 0.1
Author: Andreas Krennmair
Author URI:

function link_wikipedia_entries($text) {
$text = preg_replace('/[[([^][]*)\|([^][]*)]]/','<a href="$1">$2</a>',$text);
$text = preg_replace('/[[([^][]*)]]/','<a href="$1">$1</a>',$text);
$text = preg_replace('/\\[]]/',']',$text);
$text = preg_replace('/\\[[]/','[',$text);
return $text;

// Highlight text and comments:
add_filter('the_content', 'link_wikipedia_entries');
add_filter('comment_text', 'link_wikipedia_entries');