Warning: ?PDO::__construct(file://D:\phpStudy\PHPTutorial\WWW\UserManager\pdo\dsn.txt): failed to open stream: No such file or directory in D:\phpStudy\PHPTutorial\WWW\UserManager\pdo\pdo_connectdburi.php on line 8
invalid data source URI

//通過URI形式連接數(shù)據(jù)庫
try{
????$dsn='uri:file://D:\phpStudy\PHPTutorial\WWW\UserManager\pdo\dsn.txt';
????$username='root';
????$password='root';
????$pdo=new?PDO($dsn,$username,$password);
????var_dump($pdo);
}catch?(PDOException?$e){
????echo?$e->getMessage();
};

感覺書寫問題啊