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    $servername="localhost";
    $username="root";
    $password="admin";
    $dbname="test";
    try{
      $conn=new PDO("mysql:host=$servername;dbname=$dbname",$username,$password);
      $conn->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
      //¿ªÊ¼ÊÂÎñ
      $conn->beginTransaction();
      $conn->exec("INSERT INTO `hello`(`firstname`,`lastname`,`email`)VALUES('YE','XIAMING','yexianming@163.com')");
      $conn->exec("INSERT INTO `hello`(`firstname`,`lastname`,`email`)VALUES('YE','CONG','yecong@163.com')");
      $conn->exec("INSERT INTO `hello`(`firstname`,`lastname`,`email`)VALUES('FANG','MENG','fangmeng@168.com')");
      //Ìa½»ÊÂÎñ
      $conn->commit();
      echo "New records created successfully!";
    }catch(PDOException $e){
       //»Ø¹oÊÂÎñ
       $conn->rollBack();
       echo $sql."<br>".$e->getMessage();
    }
    $conn=NULL;

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