Which domestic open source php programs are suitable for learning?

Which domestic open-source php programs are suitable for learning recently I want to learn about a PHP open-source program, but I don't know which one is good. please recommend it to my experts, code specifications, and MVC construction! Which domestic open source php programs are suitable for learning?
Recently, I want to learn about a PHP open-source program, but I don't know which one is good. please recommend it to the experts. the coding standards and MVC construction! Share:
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Http://www.php-open.com/11.htm
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ThinkPHP, phpcms2009, php168, discuz, phpwind,
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YouYaX for PHP

Www.stu80.com/gonggao/new.php
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New users are familiar with native writing, so don't rush with the framework mvc
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Try not to use MVC. someone will force you to use it again.
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Ecshop is good
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There are too many open-source php programs, such as dedecms and discuz. I personally think it is almost the same. I don't have to read them all. I just need to study one of them, if you are familiar with the source program of a project, you can learn other similar programs quickly and easily. Remember not to read all of them, but none of them are refined.
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Support the upstairs statement. recently, DEDECMS has been studied with a single mind. it started from MVC,
I used the original code when I was doing ASP. PHP felt like ASP, so I directly came into contact with MVC.

Www.msheji.com