PHP Mysql Transaction
在PHP中,mysqli 已经很好的封装了mysql事务的相关操作。如下示例:
- $sql1 = "update User set ScoreCount = ScoreCount +10 where ID= '123456'";
- $sql2 = "update ScoreDetail set FScore = 300 where ID= '123456'";
- $sql3 = "insert into ScoreDetail ID,Score) values ('123456',60)";
- $mysqli = new mysqli('localhost','root','','DB_Lib2Test');
- $mysqli->autocommit(false);//开始事物
- $mysqli->query($sql1);
- $mysqli->query($sql2);
- if(!$mysqli->errno){
- $mysqli->commit();
- echo 'ok';
- }else{
- echo 'err';
- $mysqli->rollback();
- }
在这里,我们再使用 php mysql 系列函数执行事务。
- $sql1 = "update User set ScoreCount = ScoreCount +10 where ID= '123456'";
- $sql2 = "update ScoreDetail set FScore = 300 where ID= '123456'";
- $sql3 = "insert into ScoreDetail ID,Score) values ('123456',60)";
- $conn = mysql_connect('localhost','root','');
- mysql_select_db('DB_Lib2Test');
- mysql_query('start transaction');
- //mysql_query('SET autocommit=0');
- mysql_query($sql1);
- mysql_query($sql2);
- if(mysql_errno ()){
- mysql_query('rollback');
- echo 'err';
- }else{
- mysql_query('commit');
- echo 'ok';
- }
- // mysql_query('SET autocommit=1');
- // mysql_query($sql3);
在这里要注意,
- MyISAM:不支持事务,用于只读程序提高性能
- InnoDB:支持ACID事务、行级锁、并发
- Berkeley DB:支持事务
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