3.2.2 Constantsand variables can be used in the program to express those that may change the amount of data corresponding to, in C + +, we use constants to express those always remain unchanged data volume. In simple terms, the values, characters,
A constant can be interpreted as a constant volume. After a constant is defined, it cannot be changed anywhere in the script. A constant consists of letters, underscores, and mathematics. However, a number cannot appear as the first letter. Use the
3.2.2 Constantsand variables can be used in the program to express those that may change the amount of data corresponding to, in C + +, we use constants to express those always remain unchanged data volume. In simple terms, the values, characters,
Constants must be defined before they are used, or the program execution will fail. Use the Define () function in the PHP tutorial to define constants.
1. Syntax format: define ("Constant name", "Constant value");
For example: Define ("php360",
The constant used to learn php at the front end and the constant used to learn php* Directory [1] definition constant [2] constant detection [3] system constant [4] before magic constant
Constants do not exist in javascript. in php, they are
NO1.Where is Chang in the class file?
My previous article "schematic diagram of Java Virtual machine" 1, class file basic organizational structure has mentioned the class file structure, in the class file, after the magic number, the
A constant must be defined before use; otherwise, an error occurs during program execution. In the php Tutorial, use the define () function to define constants.1. Syntax format: define ("constant name", "constant value ");Example: define ("php360", "
What is a class constant? What we can understand in PHP is that the value is constant, so what is a class constant? In fact, the class constants are also easy to understand, we can always keep the constant value of the class is called constants, and
1. Custom Constants
* Must be defined with function define ()* The value can not be changed after the definition is finished* Use the constant name directly, not as a variable in front plus $sFor example: Define ("PI", 3.14); Define a constant$area
Constants are a very new data type in php. I will introduce some usage of PHP constants in detail for beginners. if you need to know them, refer to the PHP constant define () function.
Constants are a very new data type in php. I will introduce some
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