问题描述
Possible Duplicate:
PHP: how to get last inserted ID of a table?
I'm writing a function to add data do a database, but I then want to immediately use that entry in my code.
I know I could query: SELECT id FROM table ORDER BY id DESC
But I wonder if there's any more direct way of doing it.
That mostly depends on the interface you're using to access MySQL.
If you're using PDO (recommended), you'd use PDO::lastInsertId(): http://us.php.net/manual/en/pdo.lastinsertid.php
If you're using MySQL, you'd use mysql_insert_id() http://php.net/manual/en/function.mysql-insert-id.php
If you're using MySQLi, you'd use mysqli_insert_id(): http://us.php.net/manual/en/mysqli.insert-id.php
Just simply call whichever function is appropriate right after your INSERT completes.
It's important to note that you likely do not want to fetch id out of the database using SELECT because if you have multiple writers, you may get the id that some other thread inserted. At best, you'll operate on the wrong data, and at worst, you could have serious security issues and/or corruption.
这篇关于如何获取我刚刚插入 php/mysql 的行的 id的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！