Mysql交易處理（一個轉賬程式）

<無詳細內容> header("Content-Type:text/html;charset=utf-8"); $mysqli=new mysqli("localhost","root","","test"); if(mysqli_connect_errno()) { printf("串連失敗:%s ",mysqli_connect_error()); exit(); } $success=TRUE; $price=8000; $result=$mysqli->query("select cash from account where name='userA'"); while($row=$result->fetch_assoc()) { $value=$row["cash"]; echo $value; } $mysqli->autocommit(0); if($value>=$price){ $result=$mysqli->query("UPDATE account set cash=cash-$price where name='userA'"); }else { echo '餘額不足'; exit(); } if(!$result or $mysqli->affected_rows!=1) { $success=FALSE; } $result=$mysqli->query("UPDATE account set cash=cash+$price where name='userB'"); if(!result or $mysqli->affected_rows!=1){ $success=FALSE; } if($success) { $mysqli->commit(); echo '轉賬成功!'; }else { $mysqli->rollback(); echo "轉賬失敗!"; } $mysqli->autocommit(1); $query="select cash from account where name=?"; $stmt=$mysqli->prepare($query); $stmt->bind_param('s',$name); $name='userA'; $stmt->execute(); $stmt->store_result(); $stmt->bind_result($cash); while($stmt->fetch()) echo "使用者userA的值為：".$cash; $mysqli->close(); ?> &&&&&&&&&&&&&&&&&& create table account{ userID smallint unsigned not null auto_increment, name varchar(45) not null, cash decimal(9,2) not null, primary key(userID) )type=InnoDB; insert into account(name,cash) values ('userA','2000'); insert into account(name,cash) values ('userB','10000'); 複製代碼

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