ReflectionFunctionAbstract::getFileName Gets file name &reftitle.description; public stringfalseReflectionFunctionAbstract::getFileName Gets the file name from a user-defined function. &reftitle.parameters; &no.function.parameters; &reftitle.returnvalues; Returns the filename of the file in which the function has been defined. If the class is defined in the PHP core or in a PHP extension, &false; is returned. &reftitle.seealso; ReflectionFunctionAbstract::getNamespaceName