define
(PHP 3, PHP 4, PHP 5)
define -- Defines a named constant
Description
bool
define ( string name, mixed value [, bool case_insensitive] )
Defines a named constant at runtime.
Parameters
name
The name of the constant.
value
The value of the constant; only scalar and null values are allowed.
Scalar values are integer,
float, string or boolean values.
case_insensitive
If set to TRUE, the constant will be defined case-insensitive.
The default behaviour is case-sensitive; i.e.
CONSTANT and Constant represent
different values.
Return Values
Returns TRUE on success or FALSE on failure.
Examples
Example 1. Defining Constants
<?php
define("CONSTANT", "Hello world.");
echo CONSTANT; // outputs "Hello world."
echo Constant; // outputs "Constant" and issues a notice.
define("GREETING", "Hello you.", true);
echo GREETING; // outputs "Hello you."
echo Greeting; // outputs "Hello you."
?>
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