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$handler = mysql_connect('localhost', '', '');
mysql_select_db('test');
mysql_query('SET AUTOCOMMIT=0'); // ÉèÖÃΪ²»×Ô¶¯Ìá½»²éѯ
mysql_query('START TRANSACTION'); // ¿ªÊ¼²éѯ£¬ÕâÀïÒ²¿ÉÒÔʹÓÃBEGIN
mysql_query("INSERT INTO users VALUES ('ccc')");
mysql_query("DELETE from users WHERE username = 'aac'");
if (mysql_affected_rows($handler) == 0)
mysql_query('ROLLBACK'); // Èç¹ûɾ³ýδÕÒµ½ÏàÓ¦µÄ¼Ç¼Ôò»Ø¹ö£¬²»Ö´ÐÐÉÏÃæµÄ²åÈë²éѯ
mysql_query('COMMIT');
mysql_close($handler);
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