Description
int define(string name, mixed value, int
[
case_insensitive]
);
Defines a named constant, which is similar to a variable except:
Constants do not have a dollar sign '$' before them;
Constants may be accessed anywhere without regard to variable
scoping rules;
Constants may not be redefined or undefined once they have
been set; and
Constants may only evaluate to scalar values.
The name of the constant is given by name;
the value is given by value.
The optional third parameter
case_insensitive is also available. If the
value 1 is given, then the constant will be
defined case-insensitive. The default behaviour is
case-sensitive; i.e. CONSTANT and Constant represent different
values.
Example 1. Defining Constants 1
2 <?php
3 define ("CONSTANT", "Hello world.");
4 echo CONSTANT; // outputs "Hello world."
5 ?>
6 |
|
define() returns TRUE on success and FALSE if
an error occurs.
See also defined() and the section on Constants.
Manual: define
