mysql - SQL 语句 INERT INTO SELECT FROM WHERE 的问题

Question

这有什么问题？

mysqli_query($con, "
        INSERT INTO members (`ip`) VALUES ('$localIP') 
        SELECT * FROM members 
        WHERE username = '$uname' AND password = '$pword'");

没有插入任何内容，我也没有收到错误消息。

Answer 1

I do not have enough points to leave a comment on this but if you insert this into script you should be able to provide more information.

error_reporting(E_ALL);
ini_set('display_errors', '1');