<filename>web_1/src/config.php<?php
   define('DB_SERVER', 'localhost:3306');
   define('DB_USERNAME', getenv('MYSQL_USER_NAME'));
   define('DB_PASSWORD', getenv('MYSQL_USER_PASS'));
   define('DB_DATABASE', getenv('MYSQL_USER_DB'));

   $db = mysqli_connect(DB_SERVER,DB_USERNAME,DB_PASSWORD,DB_DATABASE);
?>
