PHP constant() Function

Return the value of a constant:

<?php
//define a constant
define("GREETING","Hello you! How are you today?");

echo constant("GREETING");
?>

Definition and Usage

The constant() function returns the value of a constant.

Note: This function also works with class constants.

constant( constant)

Parameter	Description
constant	Required. Specifies the name of the constant to check

Return Value:	Returns the value of a constant, or NULL if the constant is not defined
PHP Version:	4+