Developer(s) | Yii Software LLC |
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Initial release | December 3, 2008 |
Stable release | 1.1.9 / January 1, 2012 |
Development status | Active |
Written in | PHP |
Operating system | Cross-platform |
Type | Web application framework |
License | New BSD License |
Website | www.yiiframework.com |
Yii is an open source, object-oriented, component-based PHP web application framework. Yii is pronounced as "Yee" or [ji:] and it's an acronym for "Yes It Is!".[1]
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The Yii project started on January 1, 2008, in order to fix some drawbacks of the PRADO framework. For example, PRADO was slow when handling complex pages, had a steep learning curve and many controls were difficult to customize, while Yii is much easier and more efficient.[2] In October 2008 after ten months of private development, the first alpha version of Yii was released. On December 3, 2008, Yii 1.0 was formally released.[1]
Color | Meaning |
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Red | Old version; no longer supported |
Yellow | Old version; still supported |
Green | Current version |
Blue | Future version |
Version | Release | Release date | End of maintenance[5] | Requirement[5] |
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1.0 | 1.0 | December 3, 2008 | December 31, 2010 | PHP 5.1.0 or above |
1.0.1 | January 4, 2009 | |||
1.0.2 | February 1, 2009 | |||
1.0.3 | March 1, 2009 | |||
1.0.4 | April 5, 2009 | |||
1.0.5 | May 10, 2009 | |||
1.0.6 | June 7, 2009 | |||
1.0.7 | July 5, 2009 | |||
1.0.8 | August 9, 2009 | |||
1.0.9 | September 6, 2009 | |||
1.0.10 | October 18, 2009 | |||
1.0.11 | December 13, 2009 | |||
1.0.12 | March 14, 2010 | |||
1.1 | 1.1.0 | January 10, 2010 | December 31, 2012 or later | PHP 5.1.0 or above |
1.1.1 | March 14, 2010 | |||
1.1.2 | May 2, 2010 | |||
1.1.3 | July 4, 2010 | |||
1.1.4 | September 5, 2010 | |||
1.1.5 | November 14, 2010 | |||
1.1.6 | January 16, 2011 | |||
1.1.7 | March 27, 2011 | |||
1.1.8 | June 26, 2011 | |||
1.1.9 | January 1, 2012 | |||
2.0 | TBD | TBD | TBD | PHP 5.3.0 or above |
The Yii project has an extension repository consisting of user-contributed components.
There was also an official extension library whose name was zii, which was then merged with core framework. It is bundled in every release since Yii version 1.1.0 and it includes additional behaviors and widgets, such as grids and jQuery UI widgets.
Yii comes with a collection of official documentation, such as a tutorial to develop a simple blog application, a guide that gives the description of every feature and a class reference which gives every detail about properties, methods and events.
There's also a user-contributed documentation, most of which is available within the wiki on the official website.
Yii is released under the New BSD License (3-clause license). This means that it's possible to use it for free to develop either open-source or proprietary Web applications.[1]
The text contained in the Official Yii Documentation is licensed to the public under the GNU Free Documentation License (GFDL). In general, the Yii documentation content can be copied, modified, and redistributed so long as the new version grants the same freedoms to others and acknowledges the authors of the Yii documentation article used.[6]
The logo is licensed under a Creative Commons Attribution-No Derivative Works 3.0 Unported License.[7]
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