How to Install XML Sitemap & Google News feeds Plugin, Manually
WordPress
I. If you have been using another XML Sitemap plugin before, check your site root and remove any created sitemap.xml, sitemap-news.xml and (if you’re not managing this one manually) robots.txt files that remained there.
Search for “xml sitemap feed” and install with that slick Plugins > Add New admin page.
… OR …
Follow these steps:
Download archive.
Upload the zip file via the Plugins > Add New > Upload page … OR … unpack and upload with your favourite FTP client to the /plugins/ folder.
III. Activate the plugin on the Plugins page.
Done! Check your sparkling new XML Sitemap by visiting yourblogurl.tld/sitemap.xml (adapted to your domain name of course) with a browser or any online XML Sitemap validator. You might also want to check if the sitemap is listed in your yourblogurl.tld/robots.txt file.
WordPress 3+ in Multi Site mode
Same as above but do a Network Activate to make a XML sitemap available for each site on your network.
Installed alongside WordPress MU Sitewide Tags Pages, XML Sitemap Feed will not create a sitemap.xml nor change robots.txt for any tag blogs. This is done deliberately because they would be full of links outside the tags blogs own domain and subsequently ignored (or worse: penalised) by Google.
Uninstallation
Upon uninstalling the plugin from the Admin > Plugins page, most plugins optiosn will be cleared from the database. However, since by that time the plugin itself is already deactivated, some taxonomies cannot be removed and will remain dormant in the database. See notes in the uninstall.php file.
On multisite, the uninstall.php can loop through all sites in the network to perform the uninstalltion process for each site. However, this does not scale for large networks so it only does a per-site uninstallation when define('XMLSF_MULTISITE_UNINSTALL', true); is explicitly set in wp-config.php.
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