Detailed explanation of Symfony2 function usage

This article mainly introduces the usage of Symfony2 functions, and analyzes the related skills of calling Symfony functions and database operations in the form of examples. Friends in need can refer to it. I hope it will be helpful to everyone.

1. Call methods of other objects.

Example:

$grobal_func=$this->container->get('global_func');
//'global_func'函数所在的文件名
$lot_data=$global_func->getDataFromFile($parm1);
//getDataFromFile函数名

2. Database preliminary query

$conn = $this->em->getConnection();
$sql_user="select * from lot_user where user_name=:param1 and user_id=:param2 limit 1";
$params = array(
    'param1' => $user,
    'param2' => $uid
);
$ready = $conn->prepare($sql_user);
$ready->execute($params);
$result_user = $ready->fetchAll();

3. Database rollback event

$em->getConnection()->beginTransaction();
try{
   $lotuser = new LotUser();
   $lotuser->setId(0);
   $lotuser->setUserId($user_id);
   $lotuser->setUserName($user_name);
   $lotuser->setPassword($password);
   $lotuser->setUserTele($user_tele);
   $lotuser->setEmail($email);
   $lotuser->setRegDate($reg_date);
   $lotuser->setIdNumber($id_number);
   $lotuser->setRealUsername($real_username);
$em->persist($lotuser);
$em->flush();
$em->getConnection()->commit();
}catch(Exception $e){
$e->getConnection()->rollback();
}

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