PHP 忒聊
綴豖
ヶ輛
defined
(PHP 3, PHP 4)
Description
Returns TRUE if the named constant given by name has been defined, FALSE otherwise.
瞰赽 1. Checking Constants
?php if (defined("CONSTANT")){ // Note that it should be quoted echo CONSTANT; //}?
See also define(), constant(), get_defined_constants() and the section on Constants.
綴豖
れ萸
ヶ輛
define
奻珨撰
die