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This article mainly explains "what is the definition of php constant". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Next let the editor to take you to learn "what is the definition of php constant?"

Description

1. Const defines PI as a variable. The definition constant can only be placed in the top-level directory, not in the if statement or in the {} of function.

2. Define is a macro definition, and the definition constant can be placed anywhere.

Note that a macro definition is not a statement in the strict sense of C or C++, so there is no semicolon at the end of the line.

Example

Symbol constant # define Pi 3.1415926f; constant variable const float pi 3.1415926f what is the frame of php php:

1. Laravel,Laravel is a free and open source PHP application framework.

2. Phalcon,Phalcon is the fastest PHP framework.

3. Symfony,Symfony is a PHP framework for Web projects.

4. Yii,Yii is a fast, secure and professional PHP framework.

CodeIgniter,CodeIgniter is a very agile open source PHP framework.

6. CakePHP,CakePHP is an old PHP framework.

7. Kohana,Kohana is an agile but powerful PHP framework.

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