ReflectionFunctionAbstract::isUserDefined Checks if user defined &reftitle.description; public boolReflectionFunctionAbstract::isUserDefined Checks whether the function is user-defined, as opposed to internal. &warn.undocumented.func; &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; &true; if it's user-defined, otherwise false; &reftitle.seealso; ReflectionFunctionAbstract::isInternal