本文實(shí)例講述了php+Mysqli利用事務(wù)處理轉(zhuǎn)賬問(wèn)題的方法。分享給大家供大家參考
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<?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(kù)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(); ?> |
代碼二：
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<?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(kù)連接失敗"; exit; } try{ $age=10; $pdo->beginTransaction();//開(kāi)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(yǔ)句執(zhí)行成功，整個(gè)事務(wù)執(zhí)行成功 }catch(PDOException $e){ echo "操作失敗：".$e->getMessage(); $pdo->rollback();//執(zhí)行事務(wù)中的語(yǔ)句出了問(wèn)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"; } ?> |
以上所述就是本文的全部?jī)?nèi)容了，希望大家能夠喜歡。
