1:<?php
       2:/*
       3:Plugin Name: saWikipediaWP
       4:Plugin URI:
       5:Description: This plugin supports a w tag, to link to wikipedia. w w="article-name" puts a hot-linked W image inline.
       6:Version: 0.9
       7:Author URI: http://omino.com/blog/
       8:*/ 
       9:
      10:
      11:if(!function_exists('add_action')){
      12:?><h1>This script only useful from within WordPress</h1><?php
      13:
      14:return;
      15:}
      16:
      17:if(!$saUtils)
      18:    include "saUtils_wp.php";
      19:
      20:
      21:// +----------------
      22:// | we count on being in the same php invocation for
      23:// | possibly multiple posts on the same page,
      24:// | and maintaining our state across in globals.
      25:$gEmbeds = 1; // bump after each invocation
      26:
      27:
      28:
      29:
      30:// +--------------------------
      31:// | This is the main method -- look for tags
      32:// | and go.
      33:// | for testing, we can pass in the plugins base...
      34:function saWikipediaWP($content,$wpPluginsUrl = "")
      35:{
      36:    global $gEmbeds;
      37:    $gEmbeds++;
      38:
      39:    $foundCount = 0;
      40:
      41:    $newContent = "";
      42:
      43:    while(strlen($content))
      44:    {
      45:        $slug = extractXmlSlug($content,"w");
      46:        if($slug == NULL)
      47:        {
      48:            $trying = 0;
      49:            break;
      50:        }
      51:        $foundCount++;
      52:
      53:        # ok. we have one. Here's my ingenious replacement html.
      54:        {
      55:            $articleName = $slug["w"];
      56:            $articleName2 = preg_replace("! !","_",$articleName);
      57:            if(!$wpPluginsUrl)
      58:                $wpPluginsUrl = get_bloginfo('wpurl') . "/wp-content/plugins/";
      59:            $replacement = <<<EOP
      60:<a href="http://wikipedia.org/wiki/$articleName2" title="$articleName on Wikipedia"><img style="border:none" height="7" src="{$wpPluginsUrl}w70.png" /></a>
      61:EOP;
      62:
      63:            $content = $slug["_after"];
      64:            $newContent .= $slug["_before"] . $replacement;
      65:            
      66:        }
      67:    }
      68:
      69:    $newContent .= $content;
      70:
      71:    return $newContent;
      72:}
      73:
      74:# Tell wordpress what kind of a plugin it is
      75:add_action('the_content', 'saWikipediaWP');
      76:
      77:?>
      78: