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version 2.1.8 (May 20, 2017)

  • documentation is now available in the repository and on GitHub
  • the home of the library is now exclusively on GitHub

version 2.1.7 (May 01, 2017)

  • security tweaks (setting session.cookie_httponly and session.use_only_cookies to 1 by default)
  • the stop() method will now also remove the associated cookie

version 2.1.6 (April 19, 2017)

  • hopefully #13 is now fixed for good

version 2.1.5 (April 11, 2017)

  • closed #11; thanks @soren121
  • fixed (hopefully) #13; thanks to @alisonw for providing the current fix
  • reduced overall code complexity

version 2.1.4 (February 19, 2016)

  • fixed an issue when using the library with Composer

version 2.1.1 (September 25, 2014)

  • this version makes use of a feature introduced in PHP 5.1.0 for the "regenerate_id" method; thanks to Fernando Sávio; this also means that now the library requires PHP 5.1.0+ to work

version 2.1.0 (August 02, 2013)

  • dropped support for PHP 4; minimum required version is now PHP 5
  • dropped support for PHP's mysql extension, which is officially deprecated as of PHP v5.5.0 and will be removed in the future; the extension was originally introduced in PHP v2.0 for MySQL v3.23, and no new features have been added since 2006; the library now relies on PHP's mysqli extension
  • because of the above, the order of the arguments passed to the constructor have changed and now the "link" argument comes first, as with the mysqli extension this now needs to be explicitly given
  • added support for "flashdata" - session variable which will only be available for the next server request, and which will be automatically deleted afterwards. Typically used for informational or status messages (for example: "data has been successfully updated"); see the newly added set_flashdata method; thanks Andrei Bodeanschi for suggesting!
  • the project is now available on GitHub and also as a package for Composer

version 2.0.4 (January 19, 2013)

  • previously, session were always tied to the user agent used when the session was first opened; while this is still true, now this behavior can be disabled by setting the constructor's new "lock_to_user_agent" argument to FALSE; why? because in certain scenarios involving Internet Explorer, the browser will randomly change the user agent string from one page to the next by automatically switching into compatibility mode; thanks to Andrei Bodeanschi
  • also, the constructor has another new "lock_to_ip" argument with which a session can be restricted to the same IP as when the session was first opened - use this with caution as many ISPs provide dynamic IP addresses which change over time, not to mention users who come through proxies; this is mostly useful if you know your users come from static IPs
  • for better protection against session hijacking, the first argument of the constructor is now mandatory
  • altered the table structure
  • because the table's structure has changed as well as the order of the arguments in the constructor, you'll have to change a few things when switching to this version from a previous one
  • some documentation refinements

version 2.0.3 (July 13, 2012)

  • fixed a bug where sessions' life time was twice longer than expected; thanks to Andrei Bodeanschi
  • details on how to preserve session data across sub domains was added to the documentation
  • the messages related database connection errors are now more meaningful

version 2.0.2 (October 24, 2011)

  • fixed a bug with the get_active_sessions() method which was not working at all
  • fixed a bug where the script was not using the provided MySQL link identifier (if available)

version 2.0.1 (July 03, 2011)

  • the constructor method now accepts an optional link argument which must be a MySQL link identifier. By default, the library made use of the last link opened by mysql_connect(). On some environments (particularly on a shared hosting) the "last link opened by mysql_connect" was not available at the time of the instantiation of the Zebra_Session library. For these cases, supplying the MySQL link identifier to the constructor method will fix things. Thanks to Mark for reporting.
  • some documentation refinements

version 2.0 (April 18, 2011)

  • the class now implements session locking; session locking is a way to ensure that data is correctly handled in a scenario with multiple concurrent AJAX requests; thanks to Michael Kliewe for suggesting this and to Andy Bakun for this excellent article on the subject Race Conditions with Ajax and PHP Sessions.

version 1.0.8 (December 27, 2010)

  • fixed a small bug in the destroy method; thanks to Tagir Valeev for reporting
  • the script would trigger a PHP notice if the HTTP_USER_AGENT value was not available in the $_SERVER super-global
  • added a new method "get_settings" that returns the default session-related settings for the environment where the class is used

version 1.0.7 (October 29, 2008)

  • the class will now trigger a fatal error if a database connection is not available
  • the class will now report if MySQL table is not available

version 1.0.6 (October 01, 2007)

  • the constructor of the class now accepts a new argument: tableName - with this, the MySQL table used by the class can be changed

version 1.0.5 (September 15, 2007)

  • 'LIMIT 1' added to the read method improving the performance of the script; thanks to A. Leeming for suggesting this

version 1.0.4 (August 23, 2007)

  • rewritten the write method which previously had to run two queries each time; it now only runs a single one, using ON DUPLICATE KEY UPDATE; thanks to Inchul Koo for providing this information
  • the type of the http_user_agent column in the MySQL table has been changed from TEXT to VARCHAR(32) as now it is an MD5 hash; this should increase the performance of the script; thanks to Inchul Koo for suggesting this
  • the constructor of the class now accepts a new argument: securityCode, in order to try to prevent HTTP_USER_AGENT spoofing; read the documentation for more information; thanks to Inchul Koo for suggesting this

version 1.0.3 (December 13, 2006)

  • the get_users_online method is now more accurate as it now runs the garbage collector before getting the number of online users; thanks to Gilles for the tip
  • the structure of the MySQL table used by the class was tweaked in so that the http_user_agent column has been changed from VARCHAR(255) to TEXT and the session_data column has been changed from TEXT to BLOB; thanks to Gilles for the tip

version 1.0.2 (November 22, 2006)

  • the class was trying to store the session data without mysql_real_escape_string-ing it and therefore, whenever the data to be saved contained quotes, nothing was saved; thanks to Ed Kelly for reporting this

version 1.0.1 (September 11, 2006)

  • the structure of the MySQL table used by the class was tweaked and now the session_id column is now a primary key and its type has changed from VARCHAR(255) to VARCHAR(32) as it now is an MD5 hash; previously a whole table scan was done every time a session was loaded; thanks to Harry for suggesting this
  • added a new stop method which deletes a session along with the stored variables from the database; this was introduced because many people were using the private destroy method which is only for internal purposes
  • the default settings for session.gc_maxlifetime, session.gc_probability and session.gc_divisor can now be overridden through the constructor
  • on popular request, an example file was added

version 1.0 (August 01, 2006)

  • initial release