how to use constant in php

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

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

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

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

PHP magic constant _ METHOD _ introduction, constant _ method _. Description of the magic constant _ METHOD _ in PHP. the constant _ method ___ METHOD _ is the magic constant added after PHP5, indicating the name of the quasi-grammar. A magic

Notice: Use of undefined constant ALL_PS-assumed 'all _ Ps' in E: \ Server \ vhosts \ www.lvtao.net \ global. php on line 50Notice: Undefined index: EaseTemplateVer in E: \ Server \ vhosts \ www.lvtao.net \ libs \ template. core. php on line

Notice: Use of undefined constant ALL_PS-assumed 'all _ Ps' in E: \ Server \ vhosts \ www.lvtao.net \ global. php on line 50 Notice: Undefined index: EaseTemplateVer in E: \ Server \ vhosts \ www.lvtao.net \ libs \ template. core. php on line

Last month I specifically introduced the PHP introductory tutorial on the basic syntax of PHP introductory learning, mainly introduced several commonly used PHP tags, the composition of PHP statements, PHP comments, and so on, today's PHP

Constants are a very new data type in php. I will introduce some usage of PHP constants in detail for beginners. For more information, see. PHP constant define () function is used to define constants. once a constant is defined, it cannot be changed.

PHP constantsThe define () function is used to define constants. Once a constant is defined, it cannot be changed or undefined.Example of defining constants: The code is as follows:Copy code Define ("CONSTANT", "Hello! ");Echo CONSTANT;?>