<?php
$port = isset($argv[1]) && $argv[1] === '--with-proxy' ? 6033 : 3306;
$host = '192.168.33.38';
$username = 'root';
$password = 'Ehu4t/aDifyMNUZy';
$dbname = 'demo';
$card_number = '4743-5730-9962-4995';

$conn = mysqli_connect($host, $username, $password, $dbname, $port);
if (!$conn) {
    die("Unable to connect to db " . mysqli_connect_error());
}

$time_start = microtime(true);
$number_of_queries = 10;
for ($i = 0; $i < $number_of_queries; $i++) {
    $sql = "select * from credit_cards where number = '$card_number'";
    if (!mysqli_query($conn, $sql)) {
        die("Unable to perform query. " . mysqli_error($conn));
    }
}
$time_end = microtime(true);
echo printf("Proceed in %d seconds", $time_end - $time_start);

mysqli_close($conn);
?>