constant Returns the value of a constant &reftitle.description; mixedconstant stringname Return the value of the constant indicated by name. constant is useful if you need to retrieve the value of a constant, but do not know its name. I.e. it is stored in a variable or returned by a function. This function works also with class constants. &reftitle.parameters; name The constant name. &reftitle.returnvalues; Returns the value of the constant, or &null; if the constant is not defined. &reftitle.errors; An E_WARNING level error is generated if the constant is not defined. &reftitle.examples; ]]> &reftitle.seealso; define defined The section on Constants