Google XML Sitemaps Generator for WordPress
==============================================================================

This generator will create a sitemaps.org compliant sitemap of your WordPress site.
Currently homepage, posts, static pages, categories, archives and author pages are supported.

The priority of a post depends on its comments. You can choose the way the priority
is calculated in the options screen.

Feel free to visit my website under www.arnebrachhold.de or contact me at
himself [at] arnebrachhold [dot] de

Have fun!
  Arne

Installation:
==============================================================================
1. Upload the full directory into your wp-content/plugins directory
2. Activate the plugin at the plugin administration page
3. Open the plugin configuration page, which is located under Settings -> XML-Sitemap and customize settings like priorities and change frequencies.
4. The plugin will automatically update your sitemap of you publish a post, so theres nothing more to do :)


Additional contributors:
==============================================================================
Inspiration            Michael Nguyen      http://www.socialpatterns.com/
SQL Improvements       Rodney Shupe        http://www.shupe.ca/
Japanse Lang. File     Hirosama            http://hiromasa.zone.ne.jp/
Spanish lang. File     Omi                 http://equipajedemano.info/
Italian lang. File     Stefano Aglietti    http://wordpress-it.it/
Trad.Chinese  File     Kirin Lin           http://kirin-lin.idv.tw/
Simpl.Chinese File     june6               http://www.june6.cn/
Swedish Lang. File     Tobias Bergius      http://tobiasbergius.se/
Czech Lang. File       Peter Kahoun        http://kahi.cz
Finnish Lang. File     Olli Jarva          http://kuvat.blog.olli.jarva.fi/
Belorussian Lang. File Marcis Gasuns
Bulgarian Lang. File   Alexander Dichev    http://dichev.com

Thanks to all contributors and bug reporters! There were much more people involved
in testing this plugin and reporting bugs, either by email or in the WordPress forums.

Unfortunately I can't maintain a whole list here, but thanks again to everybody not listed here!


Release History:
==============================================================================
2005-06-05     1.0     First release
2005-06-05     1.1     Added archive support
2005-06-05     1.2     Added category support
2005-06-05     2.0a    Beta: Real Plugin! Static file generation, Admin UI
2005-06-05     2.0     Various fixes, more help, more comments, configurable filename
2005-06-07     2.01    Fixed 2 Bugs: 147 is now _e(strval($i)); instead of _e($i); 344 uses a full < ?php instead of < ?
                       Thanks to Christian Aust for reporting this :)
2005-06-07     2.1     Correct usage of last modification date for cats and archives  (thx to Rodney Shupe (http://www.shupe.ca/))
                       Added support for .gz generation
                       Fixed bug which ignored different post/page priorities
                       Should support now different wordpress/admin directories
2005-06-07     2.11    Fixed bug with hardcoded table table names instead of the $wpd vars
2005-06-07     2.12    Changed SQL Statement of the categories to get it work on MySQL 3
2005-06-08     2.2     Added language file support:
                       - Japanese Language Files and code modifications by hiromasa (http://hiromasa.zone.ne.jp/)
                       - German Language File by Arne Brachhold (http://www.arnebrachhold.de)
2005-06-14     2.5    Added support for external pages
                      Added support for Google Ping
                      Added the minimum Post Priority option
                      Added Spanish Language File by César Gómez Martín (http://www.cesargomez.org/)
                      Added Italian Language File by Stefano Aglietti (http://wordpress-it.it/)
                      Added Traditional Chine Language File by Kirin Lin (http://kirin-lin.idv.tw/)
2005-07-03     2.6    Added support to store the files at a custom location
                      Changed the home URL to have a slash at the end
                      Required admin-functions.php so the script will work with external calls, wp-mail for example
                      Added support for other plugins to add content to the sitemap via add_filter()
2005-07-20     2.7    Fixed wrong date format in additional pages
                      Added Simplified Chinese Language Files by june6 (http://www.june6.cn/)
                      Added Swedish Language File by Tobias Bergius (http://tobiasbergius.se/)
2006-01-07     3.0b   Added different priority calculation modes and introduced an API to create custom ones
                      Added support to use the Popularity Contest plugin by Alex King to calculate post priority
                      Added Button to restore default configuration
                      Added several links to homepage and support
                      Added option to exclude password protected posts
                      Added function to start sitemap creation via GET and a secret key
                      Posts and pages marked for publish with a date in the future won't be included
                      Improved compatiblity with other plugins
                      Improved speed and optimized settings handling
                      Improved user-interface
                      Recoded plugin architecture which is now fully OOP
2006-01-07     3.0b1  Changed the way for hook support to be PHP5 and PHP4 compatible
                      Readded support for tools like w.Bloggar
                      Fixed "doubled-content" bug with WP2
                      Added xmlns to enable validation
2006-03-01     3.0b3  More performance
                      More caching
                      Better support for Popularity Contest and WP 2.x
2006-11-16     3.0b4  Fixed bug with option SELECTS
                      Decreased memory usage which should solve timeout and memory problems
                      Updated namespace to support YAHOO and MSN
2007-01-19     3.0b5  Javascripted page editor
                      WP 2 Design
                      YAHOO notification
                      New status report, removed ugly logfiles
                      Better Popularity Contest Support
                      Fixed double backslashes on windows systems
                      Added option to specify time limit and memory limit
                      Added option to define a XSLT stylesheet and added a default one
                      Fixed bug with sub-pages. Thanks to:
                      - Mike Baptiste (http://baptiste.us),
                      - Peter Claus Lamprecht (http://fastagent.de)
                      - Glenn Nicholas (http://publicityship.com.au)
                      Improved file handling, thanks to VJTD3 (http://www.VJTD3.com)
                      WP 2.1 improvements
2007-01-23     3.0b6  Use memory_get_peak_usage instead of memory_get_usage if available
                      Removed the usage of REQUEST_URI since it not correct in all environments
                      Fixed that sitemap.xml.gz was not compressed
                      Added compat function "stripos" for PHP4 (Thanks to Joseph Abboud!)
                      Streamlined some code
2007-05-17     3.0b7  Added option to include the author pages like /author/john
                      Small enhancements, removed stripos dependency and the added compat function
                      Added check to not build the sitemap if importing posts
                      Fixed missing domain parameter for translator name
                      Fixed WP 2.1 / Pre 2.1 post / pages database changes
                      Fixed wrong XSLT location (Thanks froosh)
                      Added Ask.com notification
                      Removed unused javascript
2007-07-22     3.0b8  Changed category SQL to prevent unused cats from beeing included
                      Plugin will be loaded on "init" instead of direclty after the file has been loaded.
                      Added support for robots.txt modification
                      Switched YAHOO ping API from YAHOO Web Services to the "normal" ping service which doesn't require an app id
                      Search engines will only be pinged if the sitemap file has changed
2007-09-02     3.0b9  Added tag support for WordPress 2.3
                      Now using post_date_gmt instead of post_date everywhere
                      Fixed archive bug with static pages (Thanks to Peter Claus Lamprecht)
                      Fixed some missing translation domains, thanks to Kirin Lin!
                      Added Czech translation files for 2.7.1, thanks to Peter Kahoun (http://kahi.cz)
2007-09-04     3.0b10 Added category support for WordPress 2.3
                      Fixed bug with empty URLs in sitemap
                      Repaired GET building
                      Added more info on debug mode
2007-09-23     3.0b11 Changed mysql queries to unbuffered queries
                      Uses MUCH less memory
                      Fixed really stupid bug with search engine pings
                      Option to set how many posts will be included
2007-09-24     3.0    Yeah, 3.0 Final after one and a half year ;)
                      Removed useless functions
2007-11-03     3.0.1  Using the Snoopy HTTP client for ping requests instead of wp_remote_fopen
                      Fixed undefined translation strings
                      Added "safemode" for SQL which doesn't use unbuffered results (old style)
                      Added option to run the building process in background using wp-cron
                      Removed unnecessary function_exists, Thanks to user00265
                      Added links to test the ping if it failed.
2007-11-25     3.0.2  Fixed bug which caused that some settings were not saved correctly
                      Added option to exclude pages or post by ID
                      Restored YAHOO ping service with API key since the other one is to unreliable. (see 3.0b8)
2007-11-28     3.0.2.1 Fixed wrong XML Schema Location (Thanks to Emanuele Tessore)
                      Added Russian Language files by Sergey http://ryvkin.ru
2007-12-30     3.0.3  Added Live Search Ping
                      Removed some hooks which rebuilt the sitemap with every comment
2008-03-30     3.0.3.1 Added compatibility CSS for WP 2.5
2008-04-28     3.0.3.2 Improved WP 2.5 handling
2008-04-29     3.0.3.3 Fixed author pages
                      Enhanced background building and increased delay to 15 seconds
                      Background building is enabled by default
2008-04-28     3.1b1  Reorganized files in builder, loader and UI
                      Added 2 step loader so only code that's needed will be loaded
                      Improved WP 2.5 handling
                      Secured all admin actions with nonces
2008-05-18     3.1b2  Fixed critical bug with the build in background option
                      Added notification if a build is scheduled
2008-05-19     3.1b3  Cleaned up plugin directory and moved asset files to subfolders
                      Fixed background building bug in WP 2.1
                      Removed auto-update plugin link for WP < 2.5
2008-05-22     3.1    Marked as 3.1 stable, updated documentation
2008-05-27     3.1.0.1 Extracted UI JS to external file
                      Enabled the option to include following pages of multi-page posts
                      Script tries to raise memory and time limit if active
2008-12-21     3.1.1  Fixed redirect issue if wp-admin is rewritten via mod_rewrite, thanks to macjoost
                      Fixed wrong path to assets, thanks PozHonks
                      Fixed wrong plugin URL if wp-content was renamed / redirected, thanks to wnorris
                      Updated WP User Interface for 2.7
                      Various other small things
2008-12-26     3.1.2  Changed the way the stylesheet is saved (default / custom stylesheet)
                      Sitemap is now build when page is published
                      Removed support for static robots.txt files, this is now handled via WordPress
                      Added compat. exceptions for WP 2.0 and WP 2.1
2009-06-07     3.1.3  Changed MSN Live Search to Bing
                      Exclude categories also now exludes the category itself and not only the posts
                      Pings now use the new WordPress HTTP API instead of Snoopy
                      Fixed bug that in localized WP installations priorities could not be saved.
                      The sitemap cron job is now cleared after a manual rebuild or after changing the config
                      Adjusted style of admin area for WP 2.8 and refreshed icons
                      Disabled the "Exclude categories" feature for WP 2.5.1, since it doesn't have the required functions yet
2009-06-22     3.1.4  Fixed bug which broke all pings in WP < 2.7
                      Added more output in debug mode if pings fail
                      Moved global post definitions for other plugins
                      Added small icon for ozh admin menu
                      Added more help links in UI
2009-08-24     3.1.5  Added option to completely disable the last modification time
                      Fixed bug regarding the use of the HTTPS url for the XSL stylesheet if the sitemap was build via the admin panel
                      Improved handling of homepage if a single page was set for it
                      Fixed mktime warning which appeared sometimes
                      Fixed bug which caused inf. reloads after rebuilding the sitemap via the admin panel
                      Improved handling of missing sitemaps files if WP was moved to another location
2009-08-31     3.1.6  Fixed PHP error "Only variables can be passed by reference"
                      Fixed wrong URLS of multi-page posts (Thanks artstorm!)
2009-10-21     3.1.7  Added support for custom taxonomies (Thanks to Lee!)
2009-11-07     3.1.8  Improved custom taxonomy handling and fixed wrong last modification date
                      Changed readme and backlinks
                      Fixed fatal error in WP < 2.3
                      Fixed Update Notice in WP 2.8+
                      Added warning if blog privacy is activated
                      Fixed custom URLs priorities were shown as 0 instead of 1
2009-11-13     3.1.9  Fixed MySQL Error if author pages were included
2009-11-23     3.2    Added function to show the actual results of a ping instead of only linking to the url
                      Added new hook (sm_rebuild) for third party plugins to start building the sitemap
                      Fixed bug which showed the wrong URL for the latest Google ping result
                      Added some missing phpdoc documentation
                      Removed hardcoded php name for sitemap file for admin urls
                      Uses KSES for showing ping test results
                      Ping test fixed for WP < 2.3
2009-12-16     3.2.1  Notes and update messages could interfere with the redirect after manual build
                      Help Links in the WP context help were not shown anymore since last update
                      IE 7 sometimes displayed a cached admin page
                      Removed invalid link to config page from the plugin description (This resulted in a "Not enough permission error")
                      Improved performance of getting the current plugin version with caching
                      Updated Spanish language files
2009-12-19     3.2.2  Fixed PHP4 problems
2010-04-02     3.2.3  Fixed that all pages were not included in the sitemap if the "Uncategorized" category was excluded
2010-05-29     3.2.4  Fixed more deprecated function calls
                      Added (GMT) to sitemap xslt template to avoid confusion with time zone
                      Added warning and don't activate plugin if multisite mode is enabled (this mode is NOT tested yet)
                      Changed get_bloginfo('siteurl') to get_bloginfo('url') to avoid deprecation warning
                      Changed has_cap(10) to has_cap('level_10') to avoid deprecation warning
                      Fixed wrong SQL statement for author pages (Ticket #1108), thanks to twoenough
2010-07-11     3.2.5  Backported Bing ping success fix from beta
                      Added friendly hint to try out the new beta
2010-09-19     3.2.6  Removed YAHOO ping since YAHOO uses bing now
                      Removed deprecated function call
2012-04-24     3.2.7  Fixed custom post types, thanks to clearsite of the wordpress.org forum!
                      Fixed broken admin layout on WP 3.4
2012-08-08     3.2.8  Fixed wrong custom taxonomy URLs, thanks to ramon fincken of the wordpress.org forum!
                      Removed ASK ping since they shut down their service.
                      Exclude post_format taxonomy from custom taxonomy list
2013-01-11     3.2.9  Fixed security issue with change frequencies and filename of sitemap file. Exploit was only possible for admin accounts.
2013-09-28     3.3    Fixed problem with file permission checking
                      Filter out hashs (#) in URLs
2013-11-24     3.4    Fixed deprecation warnings in PHP 5.4, thanks to Dion Hulse!
2014-03-29     4.0    No static files anymore, sitemap is created on the fly
                      Sitemap is split-up into sub-sitemaps by month, allowing up to 50.000 posts per month
                      Support for custom post types and custom taxonomis!
                      100% Multisite compatible, including by-blog and network activation.
                      Added support for mu-plugins forced-activation (see sitemap-wpmu.php for details)
                      Reduced server resource usage due to less content per request.
                      New API allows other plugins to add their own, separate sitemaps.
                      Raised min requirements to PHP 5.1 and WordPress 3.3
                      Note: This version will try to rename your old sitemap files to *-old.xml. If that doesn’t work, please delete them manually since no static files are needed anymore!
                      Using only wpdb instead of unbuffered queries anymore
                      Ping to search engines are done on WP ping
                      Using PHP5 syntax instead of old PHP4 OOP style
                      Added pre-loader which checks the requirements
                      Avoid the main query of WordPress (based on plugin by Michael Adams)
                      Avoid additional queries in post sitemaps
                      Added custom post types
                      Fixed include of static front page in pages index
                      Do not list "#" permalinks from placeholder plugins
                      Removed YAHOO pings since YAHOO doesn't have its own ping service anymore.
                      Sitemap doesn't state it is a feed anymore
                      Removed Ask.com ping since they shut down their service (who uses Ask anyway?)
2014-03-31     4.0.1  Fixed bug with custom post types including a "-"
                      Changed rewrite-setup to happen on init and flushing on wp_loaded to better work with other plugins
2014-04-01     4.0.2  Fixed warning if an gzip handler is already active
2014-04-13     4.0.3  Fixed compression if an gzlib handler was already active
                      Help regarding permalinks for Nginx users
                      Fix with gzip compression in case there was other output before already
                      Return 404 for HTML sitemaps if the option has been disabled
2014-04-19     4.0.4  Removed deprecated get_page call
                      Changed last modification time of sub-sitemaps to the last modification date of the posts instead of the publish date
                      Removed information window if the statistic option has not been activated
                      Added link regarding new sitemap format
                      Updated Portuguese translation, thanks to Pedro Martinho
                      Updated German translation
2014-05-18     4.0.5  Fixed issue with empty post sitemaps (related to GMT/local time offset)
                      Fixed some timing issues in archives
                      Improved check for possible problems before gzipping
                      Fixed empty Archives and Authors in case there were no posts
                      Changed content type to text/xml to improve compatibility with caching plugins
                      Changed query parameters to is_feed=true to improve compatibility with caching plugins
                      Switched from using WP_Query to load posts to a custom SQL statement to avoid problems with other plugin filters
                      Fixed bug which caused the Priority Provider to disappear in recent PHP versions
                      Cleaned up code and renamed variables to be more readable
                      Added caching of some SQL statements
                      Added support feed for more help topics
                      Added support for changing the base of the sitemap url to another URL (for WP installations in sub-folders)
                      Changed text in XSL template to be more clear about sitemap-index and sub-sitemaps
                      Added link to new help page
                      Plugin will also ping with the corresponding sub-sitemap in case a post was modified
                      Added function to manually start ping for main-sitemap or all sub-sitemaps
                      Better checking for empty externals
                      Updated Japanese Translation, thanks to Daisuke Takahashi
2014-06-03     4.0.6  Added option to disable automatic gzipping
                      Fixed bug with duplicated external sitemap entries
                      Updated language file template
                      Don't gzip if behind Varnish
                      Improved compatibility with caches
                      Ping on post edit
2014-06-23     4.0.7  Better compatibility with managed GoDaddy hosting (clear alloptions cache when generating the sitemap)
                      Improved checking if the sitemap should be gzipped or not (depending on ob levels)
                      Removed WordPress version from the sitemap
                      Corrected link to WordPress privacy settings
                      Changed hook which is being used for sitemap pings
2014-09-02     4.0.7.1Added icon for the new WP Add-Plugin page
                      Changed "Tested up to" to 4.0
2014-11-15     4.0.8  Fixed bug with excluded categories, thanks to Claus Schöffel!
2017-03-22     4.0.9  Fixed security issue with donation submission.
2018-12-18     4.1.0  Fixed security issues related to forms and external URLs





Todo:
==============================================================================
- Your wishes :)


License:
==============================================================================
Copyright 2005 - 2018 ARNE BRACHHOLD  (email : himself - arnebrachhold - de)

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Please see license.txt for the full license.


Developer Documentation
==============================================================================

Adding other pages to the sitemap via other plugins

This plugin uses the action system of WordPress to allow other plugins
to add urls to the sitemap. Simply add your function with add_action to
the list and the plugin will execute yours every time the sitemap is build.
Use the static method "GetInstance" to get the generator and AddUrl method
to add your content.

Sample:

function your_pages() {
	$generatorObject = &GoogleSitemapGenerator::GetInstance();
	if($generatorObject!=null) $generatorObject->AddUrl("http://blog.uri/tags/hello/",time(),"daily",0.5);
}
add_action("sm_buildmap", "your_pages");

Parameters:
- The URL to the page
- The last modified data, as a UNIX timestamp (optional)
- The Change Frequency (daily, hourly, weekly and so on) (optional)
- The priority 0.0 to 1.0 (optional)


Rebuilding the sitemap on request

If you want to rebuild the sitemap because dynamic content from your plugin has changed,
please use the "sm_rebuild" hook which is available since 3.1.9.
All other methods, like calling the Build method directly are highly unrecommended and might
not work anymore with the next version of the plugin. Using this hook, the sitemap plugin will
take care of everything like loading the required classes and so on.

Sample:

do_action("sm_rebuild");

The sitemap might not be rebuild immediately, since newer versions use a background WP-Cron
job by default to prevent that the user has to wait and avoid multiple rebuilds within a very short time.
In case the sitemap plugin is not installed, nothing will happen and no errors will be thrown.

===============================================

Adding additional PriorityProviders

This plugin uses several classes to calculate the post priority.
You can register your own provider and choose it at the options screen.

Your class has to extend the GoogleSitemapGeneratorPrioProviderBase class
which has a default constructor and a method called GetPostPriority
which you can override.

Look at the GoogleSitemapGeneratorPrioByPopularityContestProvider class
for an example.

To register your provider to the sitemap generator, use the following filter:

add_filter("sm_add_prio_provider","AddMyProvider");

Your function could look like this:

function AddMyProvider($providers) {
	array_push($providers,"MyProviderClass");
	return $providers;
}

Note that you have to return the modified list!