Details of the yii framework

1. What is the yii framework

Yii is easy to pronounce and can be regarded as the abbreviation of Yes it is. Yii has two meanings in Chinese: 1. Extremely simple. 2. Continuously evolve. Yii is a component-based, high-performance PHP framework for developing large-scale web applications. Yii provides almost all the functions needed for today's Web2.0 application development. Yii is one of the most efficient PHP frameworks. Yii is the brainchild of founder Xue Qiang and began development on January 1, 2008.

Recommended: "yii Tutorial"

2. Advantages

Yii is easy to learn and use. You only need to know PHP and object-oriented programming, and you can get started quickly without having to learn a new architecture or template language in advance. Development with Yii is very fast and requires very little coding to be written for the application other than the framework itself. In fact it is one of the most efficient development frameworks.

Yii is highly reusable and extensible and is purely object-oriented. Everything in Yii is an independently configurable, reusable, and extensible component. What's more important is that Yii has more and more extension libraries. Composed primarily of user-contributed components, this may help significantly reduce your development time.

Yii is rich in features. From MVC, DAO/ActiveRecord, to theming, internationalization and localization, Yii provides almost all the features needed for today's Web 2.0 application development. The Yii Reference Manual is a complete documentation of Yii, with all the information you need to learn and master it.

Yii was carefully designed from the beginning to accommodate complex WEB application development. It is not a by-product of some project or a third-party integration. Rather, it is the culmination of the author's rich web application development experience and excellent ideas from other popular web frameworks and applications.

Last, but not least, Yii is free and Yii follows the latest BSD license. It ensures that its third-party development also follows a BSD-compatible license. This means that you are free to use Yii to develop any open source or proprietary application, both legally and financially.

3. Features

Fast, Yii only loads the functions you need. It has strong caching support. It's explicitly designed to work efficiently with AJAX. Safety, Yii is safe by its standards. It includes input validation, output filtering, SQL injection and cross-site scripting prevention. Professionally, Yii helps you develop clean and reusable code. It follows the MVC pattern, ensuring a clear separation of logic and presentation layers.

Features

● Yii has almost all the features for today's Web2.0 application development. Below is a short list of these features.

● Model-View-Controller (MVC) design pattern: Yii adopts this mature technology in WEB programming to better separate the logic layer and presentation layer.

● Database Access Object (DAO) and Active Record: Yii allows developers to model data objects in the database, thereby reducing their effort in writing long and repetitive SQL statements.

● Integration with jQuery: As one of the most popular JavaScript frameworks, jQuery can write efficient and flexible JavaScript interfaces.

● Form input and validation: YII makes collecting form input very easy and secure. Yii has a set of validators to ensure the validity of data. It also has helper methods and components to display errors when validation fails.

● Web 2.0 widgets: Powered by jQuery, YII comes with a set of Web 2.0 widgets, such as autocomplete input fields, TreeView, and more.

● Authentication and Authorization: Yii has built-in authentication support. It also supports authorization through layered role-based access control (RBAC).

● Theme: It can instantly change the view of a Yii application.

● Web services: Yii supports automatically generating complex WSDL service specifications and managing Web service request processing.

● Internationalization (I18N) and localization (L10N): Yii supports message conversion, date and time format, number format and interface localization.

● Hierarchical caching solution: Yii supports data caching, page caching, fragment caching and dynamic content. A cached storage medium that can be easily changed without touching the application code.

● Error handling and logging: Error handling is well presented, and log information can be classified, filtered and assigned to different locations.

● Security: Yii comes with many security measures to help secure web applications to prevent network attacks. These measures include cross-site scripting (XSS) prevention, cross-site request forgery (CSRF) prevention, cookie tampering prevention, etc.

● XHTML compliant: Yii components and command line tools generate code that is compliant with XHTML standards.

● Automatic code generation: Yii provides tools that can automatically generate code according to your needs, such as generating a program skeleton, CRUD application, etc.

● Completely object-oriented: Yii framework adheres to a strict object-oriented programming paradigm. It does not define any global functions or variables. Moreover, the class hierarchy it defines allows maximum reusability and customization.

● Friendly to use third-party code: Yii is carefully designed to make third-party code work very well. For example, you can use PEAR or Zend Framework code in your Yii application.

● Detailed documentation: Every single method or property is documented very clearly. A comprehensive tutorial and some beginner tutorials are also provided.

● Extension library: Yii provides an extension library composed of user-provided components, which makes the list of above functions never-ending.

About Yii

Yii is a component-based, high-performance PHP framework for developing large-scale web applications. In WEB development, Yii can maximize code reuse and greatly improve the speed of development. The name Yii (pronounced Yee or [ji:], which should be the pronunciation of "easy") represents easy, efficient and extensible

Environmental requirements

To run a Yii-driven web application, you need to have a web server that supports PHP 5.1.0 or above. For developers planning to use Yii, it will be very helpful to know object-oriented programming (OOP). Because Yii is a pure OOP framework.

Scope of application

Yii is a general web programming framework that can be used to develop almost all web applications. Since it is lightweight and has a mature caching solution, it is particularly suitable for developing high-traffic applications, such as portals, forums, content management systems (CMS), e-commerce systems, etc.

Comparison with similar products

Similar to most PHP frameworks, Yii is an MVC framework. Yii outshines other frameworks with its excellent performance, rich functionality, and clear documentation. Yii was carefully designed from the ground up to be suitable for serious web application development. It is neither a derivative of other projects nor a combination of third-party work. It is the result of the author's extensive web application development experience and research and thinking on most popular web programming frameworks and applications.

Version

Yii currently has two major versions: 2.0 and 1.1. The first stable version released by yii is: 1.1.14 (released on August 11, 2013), and the latest stable version released by yii is: 2.0.0 (released on October 12, 2014).

License

Yii is released under the BSD license. This means that you can use Yii for free to develop open source or non-open source WEB applications

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