Bug fixes

• #1008 - open_basedir() restrictions would cause is_writable() to fail with a notice; this was used in determining whether the session.save_path was writable when session.save_handler = files
• #1009 - one-click update might fail with PIWK_USER_PATH not defined
• Some non-Apache users reporting Piwik displays only a blank page after the update.

Maintenance

• sendHttpRequest() by sockets: increase buffer size and fflush() output.

Translations

• Updated French translation.

Our thanks to all the Trac and forum users who diligently submitted bug reports and feedback. You help make Piwik more stable and usable for everyone.

We are now working on performance enhancements for Piwik 0.5. Stay tuned!

Bug Fixes
#923 - invalid XML response from UsersManager.getSitesAccessFromUser
#926 - add character encoding for the Export as Image page
#935 - re-order code to make global vars available to a plugin's JavaScript
#942 - calendar should use server date for 'today'
#944 - timestamp should appear before message in log files
#945 - set session name and prefix session namespaces
#953 - API doesn't handle default null parameters well
#954 - escape left & right brackets in URL; fixes Open Flash Chart error in some environments
#962, #963 - fix "integer" and "float" detection in getRequestVar(); remove "numeric" default
#964 - fix Opera 10 detection
#974 - Swedish characters don't show up properly in UI
#975 - reload page if user logs out in another tab
#976 - exception if session.save_path not writeable
#978 - fix %ss typo in translations
#996 - fixes message box error when deleting a website open for editing (Settings | Websites)
#999 - suppress top bar navigation links for disabled plugins
#1003 - fix problem with empty translation strings
#1005 - delete obsolete directories for users updating from pre-Piwik 0.2.10
#1007 - workaround Opera 9.22 EMCAScript engine (parser bug)
- Add IGNORE keyword to ALTER statement; MySQL in 'strict' mode was erroring out 'Incorrect integer value'.
- Fix color assignments when more than 8 items loaded in Evolution chart

Maintenance

Updated Catalan, Greek, Spanish, French, Italian, Dutch, Russian, Serbian translations
#497 - Update to Zend Framework 1.9.4
#540 - adding support for plugins that define their own unit tests
#632 - move local mods to subclassed ZF classes
#749 - Login form changes
#913 - add detection for Iron web browser
#916 - update search engines list; remove some duplicates
#918 - filter out newest Googlebot
#919 - more helpful help text (Installation)
#921, #922 - Added Piwik_View::factory().
#925 - add curl & stream fallback methods to sendHttpRequest()
#929, #941 - minor css changes
#937 - set_time_limit() refactoring
#951 - remove download and outlink variable names from global.ini.php
#956 - json_encode or xml extensions required; add system checks to Installation
#957 - adding support for Tracker plugin unit testing
#958 - update the Live/Bing bot filter
#971 - Update to Open Flash Charts version 2 Lug Wrym Charmer
#995 - add bz2 and tbz2 to list of recognized download extensions in piwik.js; updated QUnit
- consistent use of Piwik_TranslateException()
- changes to isPhpCliMode()
- phpdoc updates

Translations
#759, #924, #937, #939 - We need your help translating the Installation and CoreUpdater plugins! The strings are now fully translatable. We've added browser language detection and a language selection drop down.

Our thanks to anush, bodo, cn_dark, feyp, hansfn, jpfle, pebosi, Glen Solsberry, and Ralf Trattman for patches.

- #890, #907- updates to Search Engines
- #888 - Filtering out Bing spambot
- #886 - Piwik will load bootstrap.php (if it exists) allowing for site-specific tweaks (e.g., define PIWIK_DOCUMENT_ROOT)
- #870 - Add/Edit Goal UI - can now specify goal as triggered "manually"
- #826 - new Tracker.knownVisitorInformation hook
- #793 - rewrote sendHttpRequest enabling update notifications when allow_url_fopen is Off

Fixes:
- #894 - inconsistencies between database upgrade and fresh install
- #892, 893 - Length of Visits cosmetic fixes
- #877 - Always start session; define PIWIK_ENABLE_SESSION_START=0 in bootstrap.php to get previous behaviour (may require increasing max number of MySQL connections)
- #877 - Sites management, error in the template
- #865 - unix_socket support reworked; now accepts "host", "host:port", "host:/socket/path", or "/socket/path"
- #828 - session handling fix for PHP 5.2.0 (ZF1743)
- #700 - Installation checks for zlib and SPL
- #666 - database upgrades may take too long to run in browser
-  JSON-stringified layout was in some cases not completely decoded

Maintenance:
- #911 - simplifying regular expressions
- #896, #897 - all_tests.php (unit tests) broken
- #876 - Piwik_Tracker_Visit should not validate $this->request in constructor

Translations:
- Minor changes across all translations.

Thanks to kolchak, kurakin, pebosi, and Uli for providing patches!

- FIXED #821 Piwik is PHP 5.2.10 Compatible: Incompatible method declaration in Piwik_Log_APICall
- ADDED #778 javascript API to trigger a goal trackGoal. See documentation for trackGoal Javascript function
- FIXED #814 sourceElement can become NULL in function clickHandler
- FIXED #760 Changes to 'Basic HTML' format
- FIXED #742 Open Flash Chart update to Version2 Kvasir
- FIXED #820 Piwik_ViewDataTable: $this->dataTable->getFirstRow() returns false and attempts to access getColumns()
- FIXED #815 password reset should be reset only when email was successfully sent
- FIXED #808 OFC2 export as image broken on IE8
- FIXED #805 PHP session settings
- FIXED #620 Piwik should use autoload (lazy load) classes instead of using require_once
- FIXED #798 IE6 error when clicking on menu: flash object not destroyed properly (patch by Marc Trudel)
- FIXED #795 Flash Widgets - "loading-blue.gif" never finishes
- FIXED #697 Campaign parameter ignored when not as first parameter
- FIXED #786 Installation on IIS fails with http status 405 error
- FIXED #787 change to support embedded widgets across domains; add sample cross domain policy (install in wwwroot and edit list of permitted hosts)
- FIXED #785 Bug the new piwik.js from Version 0.4 doesn't work with perfectlightbox
- FIXED #736 unset cookie value if set(name, val) is called with val = Null
- FIXED #810 Class 'Piwik_URL' not found
- FIXED #784 Error when deleting a goal
- FIXED #783 Piwik includes wrong Zend library

Most patches for 0.4.1 were submitted by Anthon Pang.

- ADDED Refresh and back button now work! Great contribution by Khanh Pham #103
It is using the jquery history plugin. period, date, idsite, module and action are persisted across requests, making Piwik much nicer and faster to use.
- ADDED search field below data tables is now using the regular expression syntax. For example, a search for "google|yahoo" would match all rows containing "google" or "yahoo". All search strings containing any of the special characters from this list: . \ + * ? [ ] $ ( ) { } = ! < > | must be escaped with a back slash, eg. if you want to search for keywords containing "piwik!" you would search for "piwik\!".
- ADDED Introducing the new "ExampleUI" plugin which shows how to plot data easily in Piwik, reusing the existing framework (evolution graph, pie chart, bar graph, sparklines, tag clouds, tables, and more!)
- ADDED #126 all dates should be correctly displayed in all graphs. For example, evolution graph for days would show, on the X axis "Mon 29", "Wed 31". For months it would show "Aug 2009", etc.
- ADDED Now displaying prettier date (better usability) as well as showing a calendar icon.
- API CHANGE method VisitFrequency.getSummary renamed in VisitFrequency.get for consistency with VisitsSummary.get
- API CHANGE: the API for the function Piwik_AddWidget has changed. The new API is Piwik_AddWidget( $widgetCategory, $widgetName, $controllerName, $controllerAction, $customParameters = array()). See examples of calls in all the core Piwik plugins. This change was necessary to make widgets more modular (they now accept custom parameters).
- API CHANGE: a small number of CSV outputs for some API calls would change following the simplification of DataTable_Simple implementation. Affected calls are VisitsSummary.get, Goals.get, VisitFrequency.get. This is due to a change in the implementation of DataTable_Simple (we simplified implementation).
- RENAMED time_before_archive_considered_outdated in time_before_today_archive_considered_outdated
- FIXED #84 Added proper translations for all columns, in tables, and graphs.
- FIXED #322 piwik is now using open flash chart 2
- ADDED: when hovering any of the sparklines, the UI makes it clear that clicking will refresh the evolution graph. This feature was in Piwik for months, and even Google Analytics implemented this UI feature after Piwik. However in Piwik it wasn't clear to the user that the sparklines were clickable.
- ADDED: now widgets can be created with custom parameters. This makes it possible to create a widget that calls a controller->action with other custom parameters, this is used in Piwik to draw an evolution graph (module=VisitsSummary & action=getEvolutionGraph) for a given metric (&columns[]=nb_visits). These custom parameters are automatically forwarded to the sparkline url, the flash graph when clicked on sparkline, etc.
- ADDED The widget layout is now saved as a JSON string rather than a custom data structure. The dashboard code should be able to read & restore most of the layouts from the old format (except the evolution graphs widgets). Simplified the Dashboard.js, widgetMenu.js, cleaned up what was a messy code.
- ADDED sentence in Widgetize to let users know they can easily export the Piwik dashboard in an iframe.
- CHANGED the way translations used in Javascript are loaded: all translations strings finishing by _js will be loaded to be used in the templates when calling {loadJavascriptTranslations plugins='YOUR_PLUGIN_NAME'}
- CHANGED Moved all templates in plugins under plugins/$PLUGIN/templates/
- CHANGED 'Khtml (Konqueror, Safari)' now displayed as 'KHTML (Safari, Chrome)'
- FIXED #651 by setting session.save_handler explicitly (patch by vipsoft)
- FIXED #646, setting cache headers explicitly to nocache instead of assuming PHP default. (patch by vipsoft)
- FIXED #682 Notice: Undefined property: Piwik_DataTable_Simple::$rows
- ADDED new configuration option: default number of rows returned in API responses "API_datatable_default_limit = 50"
- REMOVED the automatic generic filters. The limit and sort and safe decode are applied by each module when necessary.
- REMOVED exact match filter. Now all searches are using regular expressions syntax. Exact match can be done using exact search ^like this$
- FIXED notice when natural sort on a non existing column
- FIXED CSV export for datatable_array
- CHANGED Clarified code for plotting multiple lines in an evolution chart
- FIXED #624 Added icon "save as image" below all graphs (next to the Export icon)
- CHANGED Moved all JS functions into the piwikHelper static class
- FIXED Added message when flash is disabled and graph not showing, linking to piwik faq.
- FIXED Added expressInstall.swf feature so that users using old flash version are pointed to the new one automatically
- FIXED #590 - use relative path
- REMOVED quicktime detection refs #683
- ADDED new option default_period to specify which period to use by default in piwik (default is day). Possible values: day, week, month, year