PHP 5 Constants

• PHP Constants

A constant is an identifier for a simple value. The value cannot be changed in the script.
A constant consists of an English letter, an underscore, and a number, but the number cannot appear as a first letter. (The constant name does not require a $ modifier).
Note: Constants can be used throughout the script.

• Set PHP Constants

To set constants, use the Define () function with the following function syntax:

define(string=true)

The function has three parameters:
Constant_name: Required parameter, constant name, or marker.
Value: A required parameter, a constant.
Case_sensitive: Optional parameter that specifies whether case sensitive, set to True indicates insensitivity.

• Constants are global

After a constant is defined, the default is a global variable that can be used anywhere in the entire run of the script.
The following example demonstrates the use of constants within a function, even if the constants are defined outside the function.

   
    define("GREETING", "欢迎访问 Runoob.com");functionmyTest() {echo GREETING;} myTest();    // 输出 "欢迎访问 Runoob.com"?>

'). addclass (' pre-numbering '). Hide (); $ (this). addclass (' has-numbering '). Parent (). append ($numbering); for (i = 1; i <= lines; i++) {$numbering. Append ($ ('

'). Text (i)); }; $numbering. FadeIn (1700); }); });

The above describes the PHP 5 constants, including aspects of the content, I hope that the PHP tutorial interested in a friend helpful.

