在PHP上使用ON DUPLICATE KEY UPDATE时获取mysql_insert_id() [英] getting mysql_insert_id() while using ON DUPLICATE KEY UPDATE with PHP

问题描述

我已经找到了单独使用mySQL的一些答案，但是我希望有人可以向我展示一种使用PHP处理插入/更新时获取mysql数据库最后插入或更新的行的ID的方法.

I've found a few answers for this using mySQL alone, but I was hoping someone could show me a way to get the ID of the last inserted or updated row of a mysql DB when using PHP to handle the inserts/updates.

目前，我有类似这样的内容，其中column3是唯一键，并且还有一个id列是自动递增的主键:

Currently I have something like this, where column3 is a unique key, and there's also an id column that's an autoincremented primary key:

$query ="INSERT INTO TABLE (column1, column2, column3) VALUES (value1, value2, value3) ON DUPLICATE KEY UPDATE SET column1=value1, column2=value2, column3=value3";
mysql_query($query);

$my_id = mysql_insert_id();

$ my_id在INSERT上是正确的，但是在更新行时(在重复键更新上)是错误的.

$my_id is correct on INSERT, but incorrect when it's updating a row (ON DUPLICATE KEY UPDATE).

我看到一些人建议您使用类似的内容

I have seen several posts with people advising that you use something like

INSERT INTO table (a) VALUES (0) ON DUPLICATE KEY UPDATE id=LAST_INSERT_ID(id) 

在调用ON DUPLICATE KEY时获取有效的ID值-但这会将该有效ID返回给PHP mysql_insert_id()函数吗?

to get a valid ID value when the ON DUPLICATE KEY is invoked-- but will this return that valid ID to the PHP mysql_insert_id() function?

推荐答案

这是亚历山大(Alexandre)建议的答案:

Here's the answer, as suggested by Alexandre:

当您使用id = LAST_INSERT_ID(id)时，它会设置mysql_insert_id =更新后的ID的值-因此您的最终代码应类似于:

when you use the id=LAST_INSERT_ID(id) it sets the value of mysql_insert_id = the updated ID-- so your final code should look like:

<?
    $query = mysql_query("
        INSERT INTO table (column1, column2, column3) 
        VALUES (value1, value2, value3) 
        ON DUPLICATE KEY UPDATE
            column1 = value1, 
            column2 = value2, 
            column3 = value3, 
            id=LAST_INSERT_ID(id)
    ");
    $my_id = mysql_insert_id();

这将为$ my_id返回正确的值，而不考虑更新或插入.

This will return the right value for $my_id regardless of update or insert.

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