codeigniter framework analysis

CodeIgniter 3.1.8 source code analysis

CodeIgniter is a set of application development frameworks and toolkits for PHP website developers. Its goal is to enable you to develop faster, and it provides a large number of class libraries required for daily tasks, as well as simple interfaces and logical structures. This is a small and excellent framework.

Currently, the release version of CodeIgniter is 3.1.x. CodeIgniter4 does not have a stable version. The specific version of the code I read is 3.1.8. The commented code has now been uploaded to the src folder of the version library. In addition to adding Chinese annotations, some serial codes have not modified any code content compared to the original version. The framework source code can also be downloaded from the official website or git. The main code directories are system and application. The contents of reading and analysis are shown below.

Core library

• Overview of code structure and execution process
• Framework Launcher CodeIgniter.php
• BenchMark.php
• Extended framework core: hook class Hooks.php
• Address resolution class URI.php
• Router.php
• Output class Output.php
• Security class Security.php
• Input class Input.php
• Controller class Controller.php
• Loader class Loader.php
• Model class Model.php

database

• Database support class DB.php
• Cache support class DB_cache.php
• DB_driver.php
• DB_forge.php
• DB_query_builder.php
• DB_result.php
• DB_utility.php

Class Library

Session Support

• Session.php
• Session_driver.php

Helper functions