Beginning CakePHP
Programmers have used frameworks for years, though for web development the use of frameworks has been more recent. Probably the main advantage of using a framework in any project, be it web-related or not, is explained by the concept of “inversion of control.” Many programs operate in such a way...
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| Tác giả chính: | |
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| Định dạng: | Sách |
| Ngôn ngữ: | English |
| Được phát hành: |
Apress
2012
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| Những chủ đề: | |
| Truy cập trực tuyến: | http://scholar.dlu.edu.vn/thuvienso/handle/DLU123456789/30684 |
| Các nhãn: |
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| Thư viện lưu trữ: | Thư viện Trường Đại học Đà Lạt |
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| Tóm tắt: | Programmers have used frameworks for years, though for web development the use of
frameworks has been more recent. Probably the main advantage of using a framework in any
project, be it web-related or not, is explained by the concept of “inversion of control.” Many
programs operate in such a way that the code is in control. In other words, the code decides
when one operation should appear, how it should handle the user’s response, and so forth.
Imagine if this order of control were inverted. Rather than have a script or library that contains
a series of operations, the program has a series of objects that can do nothing until you extend
them (even though they may contain tons of tools you could put to use). In this way, the
framework calls on you, not the other way around.
For example, let’s say you are looking for a way to install a voting program into your web
site. You browse the Internet and find a handful of useful PHP scripts that all promise to do
that for you. After plugging in some unique settings, you place one of these scripts onto your
server and launch the program. The program runs just fine, but if you wanted to change anything,
you would have to go into the script, locate where the operation occurs that you want to
change, and work the adjustment by hand. The script manages the flow of control in the sense
that all of its operations are executed when the program runs, and if you want to control the
program, you have to alter the script. |
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