why php function mysql_insert_id still autoincrement after rollback? [closed]

Mercury2010

New Member
\[quote\] Possible Duplicate:
MySQL AUTO_INCREMENT does not ROLLBACK \[/quote\]\[code\]<?phpheader("Content-Type:text/html; charset=utf-8") ;$conn = mysql_connect('127.0.0.1', 'root', '123456') ;mysql_select_db('test') ;mysql_query('set autocommit=0') ;mysql_query('start transaction') ;try{ $sql = "insert into `user`(`username`, `password`) values('demo', 'demopassword')" ; echo $sql, '<br/>' ; $rs = mysql_query($sql) ; echo mysql_affected_rows(), '<br/>' ; if (mysql_affected_rows() > 0) { $uid = mysql_insert_id() ; echo $uid, '<br/>' ; throw new Exception('conn exception : ' . mysql_error()) ; } else { throw new Exception('conn exception : ' . mysql_error()) ; }}catch(Exception $e){ echo $e->getMessage(), '<br/>' ; echo "rollback", "<br/>" ; mysql_query('rollback') or die(mysql_error()) ;}if (!$conn) { mysql_close($conn) ;}?>\[/code\]sorry .. my english is so poor...see above codes...when I fresh that page ... uid variable will auto increment .. why?i hope u understand me...please help..thanks
 
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