CodeIgniter

CodeIgniter is based on the Model-View-Controller development pattern. MVC is a software approach that separates application logic from presentation. In practice, it permits your web pages to contain minimal scripting since the presentation is separate from the PHP scripting.

• The Model represents your data structures.
• Typically your model classes will contain functions that help you retrieve, insert, and update information in your database.
• The View is the information that is being presented to a user. A View will normally be a web page, but in CodeIgniter, a view can also be a page fragment like a header or footer. It can also be an RSS page, or any other type of "page".
• The Controller serves as an intermediary
  between the Model, the View, and any other resources needed to process the HTTP request and generate a web page.

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CakePHP

CakePHP is an open source web application framework for producing web applications written in PHP. It is written in PHP and based upon the concepts of Ruby on Rails. The distribution of CakePHP is under the MIT License.

Its major advantage is to provide architectural base in creation of Websites. CakePHP is the new system of open source customization. This system follows the pattern of model-view-controller (MVC).It can be implemented on multiple platforms.

Its a structure of libraries, classes and run-time infrastructure for programmers developing web applications. CakePHP has the primary goal to enable you to work in a structured and rapid manner - without loss of flexibility.

CakePHP is a "solid choice and certainly one of the top frameworks available today.Some of the key features include:

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Zend

Zend Framework (ZF) is an open source, object-oriented web application framework implemented in PHP 5 and licensed under the New BSD License.

Zend Platform is the only application server for PHP that supports the performance, management, integration and enterprise scalability requirements that solves these issues for organizations using PHP for their business-critical applications. By providing capabilities that streamline development and deployment,

Zend Platform improves the user experience, application responsiveness, integration to your existing infrastructure, and increases application reliability and scalability.

Zend Framework is based on simplicity, object-oriented best practices, corporate friendly licensing, and a rigorously tested agile codebase. Zend Framework is focused on building more secure, reliable, and modern Web 2.0 applications & web services, and consuming widely available APIs from leading vendors like Google, Amazon, Yahoo!, Flickr.

Features:

• All components are fully object-oriented PHP 5 and are E_STRICT compliant.
• Loosely coupled components and minimal interdependencies.
• Extensible MVC implementation supporting layouts and PHP-based templates by default
• Support for multiple database systems and vendors like MySQL, Oracle, IBM DB2, Microsoft SQL Server, PostgreSQL, SQLite, and Informix Dynamic Server.

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Symfony

Symfony is a well-designed PHP framework that is growing quickly and we want to spread the word! You can think of it as PHP on Rails, and we have been having a lot of success with it here at SolutionSet on numerous types of web application development projects.The talented team of core symfony developers at Sensio Labs is constantly working on improvements, such as version 2.0 which is planned for release in November. By basing your web project on symfony, you can rest assured that it will be logically organized and perform well under high traffic load.Symfony is a reliable, documented, full-featured, well supported, largely adopted, well coded, free and extensible framework. The cost of development, hosting and maintenance of an application with symfony is less than what it is for other solutions.

Highlights of Symfony:

• Enterprise Ready - (used for Yahoo bookmarks)
• Many plug-ins available
• Actively developed
• Good documentation
• Instant admin interface: Advanced crud generation for admin interface
• Support for Ajax and Javascript

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