douchenhui5569 2010-01-26 12:33
浏览 69

你使用mysql_error($ con)或mysql_insert_id($ con)来检查插入结果吗?

$dml = "insert into table ...";
mysql_query($dml,$con);

The above insert something into a table.then you can check if it succeeded by either

if('' == mysql_error($con))...

or

if($id = mysql_insert_id($con))...

What's your choice and reason?

BTW,will the below still have $id fetched when running both of them,I've not tried yet:

$err = mysql_error($con);
$id = mysql_insert_id($con);
  • 写回答

2条回答 默认 最新

  • douan6815 2010-01-26 12:34
    关注

    mysql_error() will always throw an error if the insert operation fails, so fetching the insert_id is not really necessary as far as I can see, unless you need it for further processing.

    Your code block should work, however the manual recommends to run insert_id() directly after issuing the query.

    Note: Because mysql_insert_id() acts on the last performed query, be sure to call mysql_insert_id() immediately after the query that generates the value.

    评论

报告相同问题?

悬赏问题

  • ¥15 本题的答案是不是有问题
  • ¥15 关于#r语言#的问题:(svydesign)为什么在一个大的数据集中抽取了一个小数据集
  • ¥15 C++使用Gunplot
  • ¥15 这个电路是如何实现路灯控制器的,原理是什么,怎么求解灯亮起后熄灭的时间如图?
  • ¥15 matlab数字图像处理频率域滤波
  • ¥15 在abaqus做了二维正交切削模型,给刀具添加了超声振动条件后输出切削力为什么比普通切削增大这么多
  • ¥15 ELGamal和paillier计算效率谁快?
  • ¥15 蓝桥杯单片机第十三届第一场,整点继电器吸合,5s后断开出现了问题
  • ¥15 file converter 转换格式失败 报错 Error marking filters as finished,如何解决?
  • ¥15 Arcgis相交分析无法绘制一个或多个图形