Change WordPress URL with mysqli & php

change-url.php

<?php
include 'wp-config.php';

$servername = DB_HOST;
$username = DB_USER;
$password = DB_PASSWORD;
$dbname = DB_NAME;

$old_url = "";
$new_url = "";


if ( !empty($old_url) && !empty($new_url) ) {

	$conn = new mysqli( $servername, $username, $password, $dbname );
	if ( $conn->connect_error ) {
	    die( "Connection failed: " . $conn->connect_error );
	} 

	$sql_options = "UPDATE wp_options SET option_value = replace(option_value, $old_url, $new_url) WHERE option_name = 'home' OR option_name = 'siteurl'";
	$sql_guid = "UPDATE wp_posts SET guid = replace(guid, $old_url, $new_url)";
	$sql_content = "UPDATE wp_posts SET post_content = replace(post_content, $old_url, $new_url)";
	$sql_postmeta = "UPDATE wp_postmeta SET meta_value = replace(meta_value, $old_url, $new_url)";

	$conn->query($sql_options);
	$conn->query($sql_guid);
	$conn->query($sql_content);
	$conn->query($sql_postmeta);

	$conn->close();

	header("Location: $new_url");
	die();

} else {
  echo "New URL or OLD url is EMPTY";
}