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