如何修复MYSQLi Select DB需要精确的2个参数

Question

I'm having a problem with my mysqli code, error is here:

Warning: mysqli_select_db() expects exactly 2 parameters, 1 given in C:\xampp\htdocs\account\login\auth.php on line 3

Here is my code in auth.php

$db = mysqli_connect('localhost', 'root', '', 'tc');
mysqli_select_db($db) or die(mysqli_error($db));

Answer 1

please read this link

mysqli_select_db() expects exactly 2 parameters

By second parameter

Selects the default database to be used when performing queries against the database connection