php - fatal error : Class 'SELF' not found

Question

我有以下相关代码:

try {
    self::$db = new PDO($dsn, self::USER, SELF::PASS); //Connect to the database, and store the pdo object.
    self::$db->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
}
catch (PDOException $e) {
    throw new Exception("There have been an error in the connection: ". $e->getMessage());
}

执行此代码所在的静态函数时，出现以下错误:

Fatal error: Class 'SELF' not found in P:ath/to/script.php on line 107

不知道是什么原因造成的，谁能赐教？

提前致谢。

Answer 1

使用 self::PASS 而不是 SELF::PASS