mysql_test_php

<?php
// WordPress database connection test usingo mysqli

// Enable all messages
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

$conn = mysqli_connect('localhost', 'username', 'password');
mysqli_select_db($conn, "my_wordpress_database");

if (!$conn) {
  die('ERROR: Unable to connect: ' . mysql_error());
}

echo 'Connected to the database.<br>';

$result = mysqli_query($conn, 'SELECT user_login FROM wp_users');

$row = mysqli_fetch_row($result);
echo "User : ", $row[0], "<br>\n";

mysqli_close($conn);
?>