<?php

//1.造PDO對象
$dsn ="mysql:dbname=mydb;host=localhost";//數(shù)據(jù)庫類型:dbname=數(shù)據(jù)庫名稱;host=鏈接的ip或本機
$pdo =new PDO($dsn,"root","root");//$dsn,帳號，密碼

//2.寫SQL語句
$sql ="select * from info"; 
$sql ="insert into info values('004','王六','男','n007','1994-02-11')";

//3.執(zhí)行SQL語句
$stm = $pdo->query($sql); //查詢語句用query,返回的是結(jié)果
$arr = $pdo->exec($sql);//增刪改用exec，返回的是執(zhí)行的行數(shù)

//4.從PDOStatement對象里面讀數(shù)據(jù)
$arr =$stm->fetch(PDO::FETCH_NUM);//默認不選為PDO::FETCH_BOTH fetch為選擇一條數(shù)據(jù)
$arr = $stm->fetchAll(PDO::FETCH_BOTH);//fetchAll為全選

//事務(wù)類型:即要不全部都通過，要不全部失敗，可以參考淘寶購物，必須同時滿足扣款，減去庫存和添加訂單三項條件，缺一不可
//beginTransation 啟動事務(wù)
//commit 提交事務(wù)
//rollback 回滾:返回到啟動事務(wù)之前


//1.造PDO對象
$dsn ="mysql:dbname=mydb;host=localhost";
$pdo =new PDO($dsn,"root","root");

//2.將PDO的錯誤類型設(shè)置為異常模式
$pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);

try //嘗試運行,包含從開啟事務(wù)到提交事務(wù)
{
  //開啟事務(wù)
  $pdo->beginTransaction();
  $sql1 = "insert into info values('004','進口','男','n008','1994-05-11')";
  $sql2 = "insert into info values('005','審核','男','n009','1994-07-11')";
  $sql3 = "insert into info values('006','姐我','男','n0010','1994-08-11')";
  
  $pdo->exec($sql1);
  $pdo->exec($sql2);
  $pdo->exec($sql3);
  
  //提交事務(wù)
  $pdo->commit();
}
  catch(Exception $e)
  {
    //回滾操作
    $pdo->rollBack();
    
  }
  //強類型語言中使用
  final
  {
    //最終執(zhí)行，無論有沒有異常出現(xiàn)，該代碼都會執(zhí)行
  }
?>