Heim >Backend-Entwicklung >PHP-Tutorial >thinkphp 的事务回滚处理 和 原始PHP的事务回滚实例,thinkphp实例_PHP教程
1. 要程序里面支持事务,首先连接的数据库和数据表必须支持事务 mysql 为例:
数据库InnoDB支持 transactions
数据表支持事务:InnoDB 支持transaction
2. 框架thinkphp 支持事务代码
<span>public</span> <span>function</span><span> testrollback(){ </span><span>$model1</span> = D('item'<span>); </span><span>$model2</span> = D('vote'<span>); </span><span>$model1</span>-><span>startTrans(); </span><span>$res1</span> = <span>$model1</span>->where('id = 5')-><span>delete(); </span><span>$res2</span> = <span>$model2</span>->where('id = 2')-><span>delete(); dump(</span><span>$res1</span><span>); dump(</span><span>$res2</span><span>); </span><span>if</span>(<span>$res1</span> && <span>$res2</span><span>){ </span><span>$model1</span>->commit(); <span>//</span><span>只有$res1 和 $res2 都执行成功是才真正执行上面的数据库操作</span> dump("commit"<span>); }</span><span>else</span><span>{ </span><span>$model1</span>->rollback(); <span>//</span><span> 条件不满足,回滚</span> dump("rollback"<span>); } dump(</span>"over"<span>); </span><span>exit</span><span>; }</span>
3. 原始PHP 代码事务实例
方法一:只支持数据库和数据表都是 innoDB 的情况
<span>public</span> <span>function</span><span> rollbackoriginal1(){ </span><span>$conn</span> = <span>mysql_connect</span>('127.0.0.1','summerzi','summerzi') or <span>die</span>('DB connection failed!'<span>); </span><span>mysql_select_db</span>('summer',<span>$conn</span><span>); </span><span>mysql_query</span>('set names "GBK"'<span>); </span><span>mysql_query</span>('BEGIN'<span>); </span><span>$sql1</span> = "INSERT INTO `summer_userdata`(`uid`,`type`,`target_id`) VALUES(41,1,233);"<span>; </span><span>$sql2</span> = "INSERT INTO `summer_userdata`(`uid`,`type`,`target_id`) VALUES(fdfd,2,235);"<span>; </span><span>$res1</span> = <span>mysql_query</span>(<span>$sql1</span><span>); </span><span>$res2</span> = <span>mysql_query</span>(<span>$sql2</span><span>); dump(</span><span>$sql1</span><span>); dump(</span><span>$sql2</span><span>); dump(</span><span>$res1</span><span>); dump(</span><span>$res2</span><span>); </span><span>if</span>(<span>$res1</span> && <span>$res2</span><span>){ </span><span>mysql_query</span>('COMMIT'<span>); dump(</span>'commit success!'<span>); }</span><span>else</span><span>{ </span><span>mysql_query</span>('ROLLBACK'<span>); dump(</span>'commit failed, rollback!'<span>); } </span><span>mysql_query</span>('END'<span>); }</span>
方法二:(注意:对于不支持事务的MyISAM引擎数据库可以使用表锁定的方法)
<span>public</span> <span>function</span><span> rollbackoriginal2(){ </span><span>$conn</span> = <span>mysql_connect</span>('127.0.0.1','summerzi','summerzi') or <span>die</span>('DB connection failed!'<span>); </span><span>mysql_select_db</span>('summer',<span>$conn</span><span>); </span><span>mysql_query</span>('set names "GBK"'<span>); </span><span>mysql_query</span>('SET AUTOCOMMIT=0');<span>//</span><span>//设置mysql不自动提交,需自行用commit语句提交</span> <span>$sql1</span> = "INSERT INTO `summer_userdata`(`uid`,`type`,`target_id`) VALUES(41,1,233);"<span>; </span><span>$sql2</span> = "INSERT INTO `summer_userdata`(`uid`,`type`,`target_id`) VALUES(44,2,235);"<span>; </span><span>//</span><span>mysql_query("LOCK TABLES `hmbl_userdata` WRITE");//锁定表</span> <span>$res1</span> = <span>mysql_query</span>(<span>$sql1</span><span>); </span><span>$res2</span> = <span>mysql_query</span>(<span>$sql2</span><span>); dump(</span><span>$sql1</span><span>); dump(</span><span>$sql2</span><span>); dump(</span><span>$res1</span><span>); dump(</span><span>$res2</span><span>); </span><span>//</span><span>mysql_query("UNLOCK TABLES");//解除锁定</span> <span>if</span>(<span>$res1</span> && <span>$res2</span><span>){ </span><span>mysql_query</span>('COMMIT'<span>); dump(</span>'commit success!'<span>); }</span><span>else</span><span>{ </span><span>mysql_query</span>('ROLLBACK'<span>); dump(</span>'commit failed, rollback!'<span>); } </span><span>mysql_query</span>("SET AUTOCOMMIT=1"<span>); </span><span>mysql_query</span>('END'<span>); }</span>
php + mysql 对事务的处理比较简单,涉及到业务中多个数据操作,就可以考虑用事务处理