Cant connect my database with php

$con = mysqli_connect("localhost" "root" "") or die("Unable to connect");
 mysqli_select_db("logindb", $con);
 ?>

This is the configuration of the connecting.

require 'config.php';
 ?>

This is where is connect the database to a registration page.

Can you see something wrong? This is the error i get:
Parse error: syntax error, unexpected '"root"' (T_CONSTANT_ENCAPSED_STRING)

Thanks,
Realcookie

Answer

You are missing the commas bro. Here is the corrected one

$con = mysqli_connect("localhost", "root", "") or die("Unable to connect");
 mysqli_select_db($con, 'logindb'); 
 ?>