如何使用php从mysql获取当前的user_id？

Question

I need to know the current user_id where this user_id is an auto increment column.

How to find the current user_id using php code?

Suppose, the last user_id is 23.

The next created user will have an user_id of 24. How to know this after executing the related INSERT query?

Answer 1

To get the last added user id, where id is auto-increment:

$n = mysql_query("SELECT max(id) FROM tablename");

Thus, the return value of mysql_query gives it back to you. In your example, $n will be 24.