<?php 
 header("Content-type:text/html; charset=utf-8"); 
  
 $mysqli = new mysqli("localhost", "root", "064319", "php"); 
 $mysqli->set_charset("utf8"); 
  
 if($mysqli->connect_errno) { 
  die('數(shù)據(jù)庫連接失敗'.$mysqli->connect_error); 
 } 
  
 $mysqli->autocommit(false); //自動(dòng)提交模式設(shè)為false 
 $flag = true; //事務(wù)是否成功執(zhí)行的標(biāo)志 
  
 $query = "update account set balance=balance-1000 where id=3"; 
 $result = $mysqli->query($query); 
 $affected_count = $mysqli->affected_rows; 
 if(!result || $affected_count == 0) { //失敗 
  $flag = false;  
 } 
  
 $query = "update account set balance=balance+1000 where id=2"; 
 $result = $mysqli->query($query); 
 $affected_count = $mysqli->affected_rows; 
 if(!$result || $affected_count == 0) { 
  $flag = false; 
 } 
  
 if($flag) { 
  $mysqli->commit(); 
  echo '轉(zhuǎn)賬成功'; 
 } else { 
  $mysqli->rollback(); 
  echo '轉(zhuǎn)賬失敗'; 
 } 
  
 $mysqli->autocommit(true); //重新設(shè)置事務(wù)為自動(dòng)提交 
 $mysqli->close(); 
?>

<?php 
 try{ 
 $pdo=new PDO("mysql:host=localhost;dbname=psp","root",""); 
 $pdo->exec("set names utf8"); 
 $pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);//設(shè)置異常處理模式 
 $pdo->setAttribute(PDO::ATTR_AUTOCOMMIT,0);//關(guān)閉自動(dòng)提交 
 }catch(PDOException $e){ 
 echo "數(shù)據(jù)庫連接失敗"; 
 exit; 
 } 
 
 try{ 
 $age=10; 
 $pdo->beginTransaction();//開始事務(wù) 
 $affected_rows1=$pdo->exec("update kfry set k_age=k_age+{$age} where k_name='user1'"); 
 $affected_rows2=$pdo->exec("update kfry set k_age=k_age-{$age} where k_name='user2'");//隨意更改使之執(zhí)行成功或失敗 
 /* if($affected_rows1&&$affected_rows2) 
 { 
 $pdo->commit(); 
 echo "操作成功"; 
 }else{ 
 $pdo->rollback(); 
 } */
 if(!$affected_rows1) 
 throw new PDOException("加入錯(cuò)誤"); 
 if(!$affected_rows2) 
 throw new PDOException("減少錯(cuò)誤"); 
 echo "操作成功"; 
 $pdo->commit();//如果執(zhí)行到此處前面兩個(gè)更新sql語句執(zhí)行成功，整個(gè)事務(wù)執(zhí)行成功 
 }catch(PDOException $e){ 
 echo "操作失?。?.$e->getMessage(); 
 $pdo->rollback();//執(zhí)行事務(wù)中的語句出了問題，整個(gè)事務(wù)全部撤銷 
 } 
 $pdo->setAttribute(PDO::ATTR_AUTOCOMMIT,1); 
 //測(cè)試是否成功 
 echo "\n操作結(jié)果為:\n"; 
 $sql="select * from kfry"; 
 $result=$pdo->query($sql); 
 foreach($result as $v) 
 { 
 echo $v['k_name']." ".$v['k_age']."\n"; 
 } 
?>