define() and require_once()

[flash gordon]

Okay, so the docs say define() defines a constant value in php but it is also global as well? How does that define method work? I specifically asking for stuff like

define("AMFPHP_BASE", realpath(dirname(dirname(dirname(__FILE__)))) . "/");
require_once(AMFPHP_BASE . "shared/app/BasicGateway.php");
require_once(AMFPHP_BASE . "shared/util/MessageBody.php");

but now other class don't define() AMFPHP_BASE but are able to have access to the constant.

 

how it is typically used?

[mikesta707]

define(constant name, value)

 

thats pretty much it

[hamza]

define

supported in (PHP 4, PHP 5)

 

purpose

define — Defines a named constant

 

Description

bool define ( string $name , mixed $value [, bool case_insensitive = false ] )

 

Defines a named constant at runtime.

 

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. It is possible to define resource constants, however it is not recommended and may cause unpredictable behavior.

 

case_insensitive

If set to TRUE, the constant will be defined case-insensitive. The default behavior is case-sensitive; i.e. CONSTANT and Constant represent different values.

 

Report a bug

Return Values

 

Returns TRUE on success or FALSE on failure.

[redarrow]

Simple way to understand.

 

The database connection is a constant.

 

Also i think define was always supported, no matter what php version.