$servername = "localhost";
$username = "Shar";
$password = "shar1234";
$conn = new mysqli($servername, $username, $password);
 if ($conn->connect_error) {
     die("Coonection failed: " . $conn->connect_error);
 }
 echo "Connected Successfully";

Warning: mysqli::__construct(): (HY000/1045): Access denied for user 'Shar'@'localhost' (using password: YES) in C:xampphtdocsSharConnection.php on line 5 Coonection failed: Access denied for user 'Shar'@'localhost' (using password: YES)