ReflectionFunctionAbstract::isClosure Checks if closure &reftitle.description; public boolReflectionFunctionAbstract::isClosure Checks whether it's a closure. &warn.undocumented.func; &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; &true; if it's a closure, otherwise &false; &reftitle.seealso; ReflectionFunctionAbstract::