PHP Connection Error; Not allowed to connect to MySQL Server - php

Question

I am trying to make a registration page where it adds the information to a SQL Table. Here is my PHP code to do this... Can anyone tell me what the error with this is?
<?php
$con=mysqli_connect("Correct Website is here","Correct Username","Correct Pass","Correct DB");
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$DBsql = mysql_query("SELECT username, email from Profiles");
$sql = mysql_fetch_array($DBsql);
if(!($_POST['username'] == $sql['username']) && ($_POST['email'] == $sql['email'])) {
if ($_POST['password'] == $_POST['password2']){
$sql="INSERT INTO Profiles (firstName, lastName, username, email, password, region, group, verified)
VALUES
('$_POST[firstname]','$_POST[lastname]','$_POST[username]','$_POST[email]','$_POST[password]','$_POST[region]','member','no')";
}else{
echo '<script type="text/javascript">'
, 'window.alert("The passwords do not match.")'
, '</script>';
}
} else {
echo '<script type="text/javascript">'
, 'window.alert("That username or email is already in use.")'
, '</script>';
}
mysqli_close($con);
?>
It's giving these errors:
Warning: mysqli_connect() [function.mysqli-connect]: (HY000/1130): Host '31.170.161.96' is not allowed to connect to this MySQL server in /home/a5349216/public_html/register.php on line 2
Failed to connect to MySQL: Host 'ip' is not allowed to connect to this MySQL server
Warning: mysql_query() [function.mysql-query]: Access denied for user 'username'#'localhost' (using password: NO) in /home/username/public_html/register.php on line 8
Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /home/username/public_html/register.php on line 8
Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in /home/username/public_html/register.php on line 9
Warning: mysqli_close() expects parameter 1 to be mysqli, boolean given in /home/username/public_html/register.php on line 27

Answer 1

If your mysql database is not on the same server(localhost) you need to give it access from a remote server for that mysql user/database for your server. See this article for some steps that might help you. It sounds like it might be remote.
https://support.rackspace.com/how-to/mysql-connect-to-your-database-remotely/

Answer 2

Create new php file, just test with below syntax. let me know your error.
$con=mysqli_connect("Correct Website is here","Correct Username","Correct Pass","Correct DB");
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}