====== description plugin ======

---- plugin ----
description: Copies a page's abstract, a global description or individual text to a meta header line that is visible in the page source.
author     : Ikuo Obataya, Matthias Schulte
email      : dokuwiki@lupo49.de
type       : action
lastupdate : 2011-08-27
compatible : 2009-12-25, 2010-11-07, rincewind
depends    : 
conflicts  : 
similar    : meta,keywords
tags       : meta

downloadurl: http://github.com/lupo49/plugin-description/tarball/master
sourcerepo: http://github.com/lupo49/plugin-description
bugtracker: http://github.com/lupo49/plugin-description/issues
----

^Download  |[[http://github.com/lupo49/plugin-description/tarball/master|Download]] |

===== Usage =====

There are three alternative methods to specify the meta header keywords:

  * Configuration option "keyword_source"
    * Value "abstract"
      * The meta headers are automatically filled with a abstract of the page of the DokuWiki metadata system
    * Value "global"
      * A global value (specified with the configuration option "global_description") is used on every page
    * Value "syntax"
      * The keywords can be individual specified for each page


== Syntax ==

(If configuration is set to "syntax")

<code>
{{description>Place the page description here}}
</code>



===== Example =====

<code>
...
<meta name="description" content="This DokuWiki plugin append an abstract of a page for a meta header. This functionality is applied to all pages by installing the plugin. 
The appended meta headers of this page is like this.    ... &lt;meta name=&quot;description&quot; content=&quot;This DokuWiki plugin append an abstract of a page for a meta header. 
This functionality is applied to all pages by installing the plugin. ExampleA meta headers of this page is like this.&quot; /&gt; ..." />
...
</code>

=====Discussion=====

> This plugin only copies abstract created by DokuWiki (e.g. for RSS feed) to meta headers. The abstract is created from the beginning of the page. To alter it, you can use [[plugin:meta]] plugin, see description->abstract element. But changing it probably will change RSS feed output if you use abstract mode of RSS. --- //[[mail@mplicka.cz|Martin Plicka]] 2008/09/08 09:46//

\\

I modified the description function to make it more search engine friendly (max. 150 chars / max 30 words).
New: Checks if DOKU_MEDIADETAIL is set so no duplicate description tags will be generated for media detail view.
<code php>
  function description(&$event, $param) {
      if(empty($event->data)||empty($event->data['meta'])) return;

      global $ID;
      $d = p_get_metadata($ID,'description');
      if(empty($d)) return;

      $a = str_replace("\n"," ",$d['abstract']);
      if(empty($a)) return;
		// Begin SEO Changes	
		// Set the max words and the max lenght for description Tag
		$words = 30; //Max 30 words
		$lenght = 150; //Max 150 characters 	
		$array = explode(' ',$a);	
		$a = "";		
		$i = 0;
		foreach($array as $value){
			if($value != ""){			
				if( $i <= $words){
					$temp .= $value." ";					
					if(strlen($temp) <= $lenght){			
						 $a .= $value." ";
					}else{
						 break;					
					}
				}else{
					 break;
				}
			}
			$i++;		
		}
		// END SEO Changes
      $m = array("name"=>"description","content"=>$a);
      if(!defined('DOKU_MEDIADETAIL')){      
      $event->data['meta'][] = $m;
      }
  }
</code>
If you like it, you can use it :)  --- [[user>flam]] //2010/12/28 19:00//

>I'm using this plugin also with Keywords plugin. The abstract is actually not created from the beginning of the page but it takes all words marked with BOLD at my page www.riversedge.pl. Why? Any chances to fix it?  --- [[user>V-12]] //2011/08/18 10:54//
>> Edit: The abstract ignores Styled text except Bold text. Any chances to have this plugin working like Keywords plugin where I can manually write description for single page? --- [[user>V-12]] //2011/08/25 18:41//