CSV Importer in PHP ( run via terminal)

import.php

<?php
/**
 * importer for CSV in MySQL DB.
 * pleas keep tje CSV file in the same directory and run :
 *
 * > php ./import.php
 */

$host = "localhost"; // Host name.
$db_user = "root"; //mysql user
$db_password = ""; //mysql pass
$db = ''; // Database name.

$con = mysqli_connect($host, $db_user, $db_password, $db);

// Check connection
if (mysqli_connect_errno()) {
    echo "Failed to connect to MySQL: " . mysqli_connect_error();
}

$file = fopen('filename.extension', "r");
while (($data = fgetcsv($file, 100000, ",")) !== FALSE) {
    $sql = "INSERT into hs_codes(col1, col2, col3) values('$data[0]', '$data[1]', '$data[2]')";
    mysqli_query($con, $sql);
}

fclose($file);
echo "CSV File has been successfully Imported.";