FROM php:7.1-fpm-alpine
RUN docker-php-ext-install mysqli

$serverName = 'localhost';
$userName = 'wp';
$password = 'wp2017';
$dbName = 'wp2017';

$link = mysqli_connect($serverName, $userName, $password, $dbName);

if (mysqli_connect_errno()) {
   printf("Connect failed: %sn", mysqli_connect_error());
  exit();
}