Is secondary development of PHP difficult? Four basic requirements for secondary development

Secondary development is not difficult; because secondary development is to customize and modify existing software, expand functions, and then achieve the functions and effects you want. Generally speaking, the original software will not be changed. The kernel of the system.

#1. What is secondary development?

Secondary development, to put it simply, is to customize and modify existing software, expand functions, and then achieve the functions and effects you want. Generally speaking, the core of the original system will not be changed. .

2. Why secondary development?

With the continuous development of information technology, a series of excellent open source works have emerged in the IT industry, and their authors are either individuals, project teams, or software companies. Selecting and applying these excellent open source software, and carrying out secondary development that meets business needs on this basis, will not only save information costs (time costs and development costs) for enterprises, but also provide technical guarantees. This is what we often hear: stand on the shoulders of giants and you will see further. Therefore, many domestic companies need secondary development talents.

3. How to do secondary development?

First, you must have a language foundation for the language used in this open source product. Being able to understand the code is the most basic.

Second, you need to be familiar with the functions and uses of this open source product. Because you are familiar with it, you will know a requirement, what you want to change, and what comes with the system. It probably takes How to change.

Third, you must be familiar with the data structure, code structure, system framework structure of this open source product, where the core is, and where the subsidiary functions are. To put it simply, it means familiarity with databases, code logic, and file directories.

Fourth, according to your needs, then use the core of open source products to expand and modify the system to meet your needs

4. Introduce the secondary development of PHP open source products Basic requirements:

First, basic requirements: HTML (must be very familiar with it), PHP (can understand code, can write some small systems, such as message boards, small CMS), Mysql (at least know how to A kind of database), Javascript (can understand it and can modify some existing codes), Div+Css (can adjust the interface and understand how to use CSS)

Second, be familiar with the use of open source products , such as Dedecms, you need to know how to log in, how to create a new column, how to add articles, how to use template tags, the concept and use of models, and other functions

Third, you must be familiar with the database of this open source product Structure, you also need to understand the contents of the core files inside, such as: how to use database classes, how to do commonly used security filtering, how to use template engines, and other core contents. You also need to know the directory structure of this open source product, that is to say, you need to know where the templates are placed, where the controls are placed, where the styles are placed, etc.

Fourth, be familiar with your needs. Interpret the requirements, and then determine how to modify and expand this open source product. What can you get after secondary development? You can fulfill your needs and you can accumulate experience. The experience here is your own and that of others. The so-called others' benefit means that when you do this secondary development, you can absorb the essence of this system and then integrate it into your own thinking, and you can also summarize the experience of the project architecture. There is a saying that goes like this: Smart people will regard other people's failure experiences as their own experiences, while stupid people will regard them as their own experiences after experiencing failures countless times.

Secondary development is not just development, but more importantly, absorbing the essence, summing up experience, straightening out ideas, avoiding detours, and improving yourself.

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