- CodeIgniter is an Application Development Framework - a toolkit - for people who build websites using PHP - CI4 helps you to develop the projects in much faster - We can minimizing the amount of code needed for a given task. - Exceptional performance, zero configuration, no need of command line knowledge and more.. - CI4 was Completely re-written. What is a Framework ? - A framework is a platform to develop software applications like desktop and web applications - Frameworks are always created by using programming languages. Like - PHP: CodeIgniter, Laravel, Symphony, YII, ZEND etc… - Java: Struts, Hibernate, Spring etc.. - JavaScript: Angular, React, Node etc... - Framework is nothing but concising the code Advantages of a Framework ? - All frameworks will follow design patterns like MVC, singleton, factory method etc.. - Secured Code. - Duplicate and redundant code can be avoided - Time required to develop an application is reduced significantly - Less cost And more...