define Defines a named constant. booldefine stringname mixedvalue boolcase_insensitive Defines a named constant. See the section on constants for more details. The name of the constant is given by name; the value is given by value. The optional third parameter case_insensitive is also available. If the value &true; is given, then the constant will be defined case-insensitive. The default behaviour is case-sensitive; i.e. CONSTANT and Constant represent different values. ]]> &return.success; See also defined, constant and the section on Constants.