您搜索了: undefined (韩语 - 斯洛伐克语)

call_user_function() returns success on success, and failure in case the function cannot be found. you should check that return value! if it returns success, you are responsible for destroying the retval pval yourself (or return it as the return value of your function). if it returns failure, the value of retval is undefined, and you mustn't touch it.
ak vráti failure, nie je hodnota retval definovaná a nesmiete sa jej dotknúť.