How to lookup for proxy record using PHP and MySQL for IPV4

/****************************************************************************************************************/
/* Description: This snippet is provide simple way to show user on how to lookup for a proxy record.            */
/*              suggestions for different city locations across the country.                                    */
/*              There are 1 steps in this snippet. For information, please visit IP2Location tutorial page at:  */
/*https://www.ip2location.com/tutorials/how-to-lookup-for-proxy-record-using-php-and-mysql                      */
/****************************************************************************************************************/
/* You can obtain to setup the proxy database for IPv4 at:                                                      */
/* https://lite.ip2location.com/database/px4-ip-proxytype-country-region-city-isp                               */

<?php
    //Open connection to mysql server
    $mysqli = new mysqli('localhost', 'root', '', 'ip2location');

    //Check connection
    if ($mysqli->connect_errno) {
        printf("Connect failed: %s\n", $mysqli->connect_error);
        exit();
    }

    //Check if the IP address is a proxy address
    $ip_address = '4.0.0.37';
    $result = $mysqli->query('SELECT * FROM ip2proxy_px4 WHERE inet_aton("' . $ip_address . '") between ip_from AND ip_to LIMIT 1');

    if ($result->num_rows > 0){
        //proxy
        $row = $result->fetch_assoc();
        echo 'IP Address: ' . $ip_address . '<br>';
        echo 'Proxy Type: ' . $row['proxy_type'] . '<br>';
        echo 'Country Code: ' . $row['country_code'] . '<br>';
        echo 'Country Name: ' . $row['country_name'] . '<br>';
        echo 'Region Name: ' . $row['region_name'] . '<br>';
        echo 'City Name: ' . $row['city_name'] . '<br>';
        echo 'ISP: ' . $row['isp'] . '<br>';
    }
    else{
        //non-proxy
        echo $ip_address . ' is not a proxy<br>';
    }
?>