(PHP 3, PHP 4 )
defined --
Checks whether a given named constant exists
Description
int
defined ( string name)
Returns TRUE if the named constant given by
name has been defined, FALSE otherwise.
예 1. Checking Constants <?php
if (defined("CONSTANT")){ // Note that it should be quoted
echo CONSTANT; //
}
?> |
|
See also define() and the section on Constants.