Does the PHP framework belong to the two-time development? such as TP CI, ask the great God to give a convincing answer
I looked at it, and asked the great God to give a convincing answer.
------to solve the idea----------------------
First look at the definition of Baidu Encyclopedia
A
framework is a basic conceptual structure used to solve or deal with complex problems. This broad definition uses a very popular, especially in software concept.
two times development , simple is to be in the existing software to customize the modification, function expansion, and then achieve their desired function, in general, will not change the original system kernel.
In this sense, not two times development
Because TP, CI, ZF, yii .... Just provides a solution that itself is not a complete software
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