Access denied for user 'user11'@'localhost' (using password: YES) [closed]

I'm getting Access denied for user 'user11'@'localhost' (using password: YES) error using the code below:

My config.ini file: (stored in /home1/user)

[database]
username=user11
password=my_password_here
dbname=my_database_name_here

My PHP file: (Stored in the home1/user/public_html folder)

<?php

error_reporting(0);

$input = $_GET['data'];

$config = parse_ini_file('../config.ini'); 

$conn = new mysqli('localhost', $config['username'], $config['password'], $config['dbname']);

if ($conn->connect_error) {
  die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT student FROM studentslist WHERE award='$input'";

$result = $conn->query($sql);

if ($result->num_rows > 0) {
  while($row = $result->fetch_assoc()) {
    echo $row["student"];
  }
} else {
  echo "0 results";
}
$conn->close();
?>

My user name, password and database name are all correct. I've already assigned full privilege to the user11 from cPanel. Any help is appreciated.

source https://stackoverflow.com/questions/67942003/access-denied-for-user-user11localhost-using-password-yes