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This page explains how to discourage "link spamming" on your wiki site using PmWiki's urlapprove.php script.
Occasionally spammers may try to add large number of (sometimes hidden) URLs to pages because they think it will improve their search engine rankings -- which it probably won't. The urlapprove.php script works against these spammers' purpose by
To enable urlapprove.php, add the following line to a configuration file:
By default, unapproved links display a (approve sites) link instead of the unapproved link.
A click on the link will approve all unapproved URLs on the page, but only if you are authorized to edit the
Limiting unapproved urls per page
You can limit the number of unapproved links per page. If the limit is exceeded, the page cannot be saved. This is useful because spammers like to write long link lists, which is rare for normal authors.
Example: To set the limit to 5 unapproved links, add the following line to a configuration file:
Note that $UnapprovedLinkCountMax must be set before including the urlapprove.php script.
Handling of Unapproved Links
You can also change the disapproval message defined in the $UnapprovedLinkFmt variable, for example:
include_once('scripts/urlapprove.php'); $UnapprovedLinkFmt = "[$[Link requires approval]]<a class='apprlink' href='\$PageUrl?action=approvesites'>$[(approve)]</a>";
If you wish to totally forbid unapproved links you can use
Please note that in general you need to go to the sidebar page in order to approve links in the sidebar. The reason for this is that the approve mechanism only approves links on the current page.
After initial setup all existing links become un-approved. To find out which pages are affected one can use an RSS feed on AllRecentChanges. All pages with unappreved links will show up there.
Urls are approved by adding them to a "white list", defined in the variable
$WhiteUrlPatterns = "http://example.com/|http://example.net/|http://example.org/";
To add all urls from, say New Zealand and Australia, use:
$WhiteUrlPatterns = 'http://[^/] \\.nz'; $WhiteUrlPatterns = 'http://[^/] \\.au';
If you want to change the default name of this
Generally, it might be
To see what link is to be approved without editing the page a tool tip can be displayed when the cursor hovers over the (approve Links) link that displays the URL. e.g. Example
Add the following setting in your local/config.php:
$UnapprovedLinkFmt = "\$LinkText<a class='apprlink' href='\$PageUrl?action=approvesites' title='\$LinkUrl'>$[(approve sites)]</a>";
By default, PmWiki creates external links that are not followed by search engines. Here are release notes from pmwiki-2.0.beta20 (30-Jan-2005):