This is a three-time development project. The customer originally asked someone else to develop an online education platform system. Because the online education platform has many functions, it is unrealistic to re-develop it, and the time will definitely not catch up with the customer's construction period requirements. That buddy is quite reliable. He directly bought the source code of someone else's commercial authorized PHP education system on the Internet. If you are looking for pirated source code, you may have to kill the customer. This set of source code courses, on-demand, and live broadcast functions are all available. The only shortcoming is that the core code is protected by a PHP extension library written in C language, and the value of later in-depth development is not high.
The client came to me for three times of development through the introduction of a friend, mainly to do class-related functions, such as homework, practice, examination, students, class courses and so on. It's not clear why the original developers didn't continue to work on these features for customers.
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Lessons learned from the perspective of project outsourcing: the first outsourcing is not ideal, which will cause customers to double their time and costs.