PHP/MySQL插入行，然后获取"id" [英] PHP/MySQL insert row then get 'id'

问题描述

当我插入一行时，表的'id'字段会自动增加.我要插入一行，然后获取该ID.

The 'id' field of my table auto increases when I insert a row. I want to insert a row and then get that ID.

我会按照我说的去做，但是有没有办法我不用担心插入行和获取ID之间的时间呢?

I would do it just as I said it, but is there a way I can do it without worrying about the time between inserting the row and getting the id?

我知道我可以在数据库中查询与输入的信息匹配的行，但是变化很大，会有重复项，唯一的区别是id.

I know I can query the database for the row that matches the information that was entered, but there is a high change there will be duplicates, with the only difference being the id.

推荐答案

$link = mysqli_connect('127.0.0.1', 'my_user', 'my_pass', 'my_db');
mysqli_query($link, "INSERT INTO mytable (1, 2, 3, 'blah')");
$id = mysqli_insert_id($link);

请参见 mysqli_insert_id() .

无论您做什么，都不要插入然后执行"SELECT MAX(id) FROM mytable".就像您说的那样，这是比赛条件，没有必要. mysqli_insert_id()已经具有此功能.

Whatever you do, don't insert and then do a "SELECT MAX(id) FROM mytable". Like you say, it's a race condition and there's no need. mysqli_insert_id() already has this functionality.

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