how to get data from mysql database using php

<?php
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "search";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
 
$sql = "Select * from keywords"; 

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

while ($row = $result->fetch_row()) { 
  print '<pre>';
  print_r($row);
  print '</pre>';
}
?>