$result=self::$PDOStatement->fetchAll(constant('PDO::FETCH

源自：5-4 [PDO] 数据库操作类之获取一条记录

$result=self::$PDOStatement->fetchAll(constant('PDO::FETCH_ASSOC'));

测试显示Fatal error: Uncaught Error: Call to a member function fetchAll() on null in D:\phpstudy_pro\WWW\www.test.com\PDOmysql.php:57 Stack trace: #0 D:\phpstudy_pro\WWW\www.test.com\PDOmysql.php(99): Mysql::getAll() #1 {main} thrown in D:\phpstudy_pro\WWW\www.test.com\PDOmysql.php on line 57

可是感觉代码没错误啊

提问者：宝慕林7195329 2022-08-04 13:46

$result=self::$PDOStatement->fetchAll(constant('PDO::FETCH_ASSOC'));

个回答