mysqli_select_db() expects exactly 2 parameters, 1 given in C:\xampp\htdocs\BankMan-master\server_connect.inc.php on line 2 code example

Example: mysqli_select_db expects 2 parameters

//do the correction as below:

$conn = mysqli_connect('localhost', 'root', '');
//the first thing that you have to pass connection variable in the select_db as first parameter. as below.

mysqli_select_db($conn,'altislife-dev');
//also you have to pass connection variable in mysqli_query() as first parameter as given below.

$records=mysqli_query($conn,$sql);