The most complete tutorial on PHP secondary development (1)

Secondary development can be said to be very familiar in our programming world, so what exactly is PHP secondary development? What are its basic requirements? Now we will take you from the shallower to the deeper to understand what PHP secondary development is.

　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 the language foundation of 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 the open source product 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, and can write some small systems, such as: message boards, small CMS ), Mysql (know at least one database), Javascript (can understand it and can modify some existing codes), Div+Css (can adjust the interface and understand how to use CSS)

Second , 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 need to To be familiar with the database structure of this open source product, you also need to understand the contents of the core files inside, such as: how to use the database class, how to do commonly used security filtering, how to use the template engine, 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.

The above points are a brief explanation of what secondary development is, what is PHP secondary development, and what are its basic requirements. On the basis of understanding these, let's focus on the later content and gain a more comprehensive understanding of PHP secondary development.

Related recommendations:

Four basic requirements for PHP secondary development

The best and most practical PHP secondary development tutorial_ PHP tutorial

Doubts about secondary development of PHP

The above is the detailed content of The most complete tutorial on PHP secondary development (1). For more information, please follow other related articles on the PHP Chinese website!