wp-config.php

<?php

if (empty($_ENV['PLATFORM_RELATIONSHIPS'])){
/*
You would put here your local configuration for example:
//define('WP_HOME', "http://localhost");
//define('WP_SITEURL',"http://localhost");
//define('DB_NAME', "my_wordpress");
//define('DB_USER', "user");
//define('DB_PASSWORD', "a strong password");
//define('DB_HOST', "127.0.0.1");
//define('DB_CHARSET', 'utf8');
//define('DB_COLLATE', '');
*/

} else {
    // This is where we get the relationships of our application dynamically
    //from Platform.sh

    $relationships = json_decode(base64_decode($_ENV['PLATFORM_RELATIONSHIPS']), TRUE);

    // We are using the first relationship called "database" found in your
    // relationships. Note that you can call this relationship as you wish
    // in you .platform.app.yaml file, but 'database' is a good name.
    define('DB_NAME', $relationships['database'][0]['path']);
    define('DB_USER', $relationships['database'][0]['username']);
    define('DB_PASSWORD', $relationships['database'][0]['password']);
    define('DB_HOST', $relationships['database'][0]['host']);
    define('DB_CHARSET', 'utf8');
    define('DB_COLLATE', '');

    $site_host = $_SERVER['HTTP_HOST'];
    $site_scheme = !empty($_SERVER['https']) ? 'https' : 'http';

    // Check whether a route is defined for this application in the Platform.sh routes.
    // Use it as the site hostname if so (it is not ideal to trust HTTP_HOST).
    if (isset($_ENV['PLATFORM_ROUTES'])) {
      $routes = json_decode(base64_decode($_ENV['PLATFORM_ROUTES']), TRUE);
      foreach ($routes as $url => $route) {
        if ($route['type'] === 'upstream' && $route['upstream'] === $_ENV['PLATFORM_APPLICATION_NAME']) {
          // Pick the first hostname, or the first HTTPS hostname if one exists.
          $host = parse_url($url, PHP_URL_HOST);
          $scheme = parse_url($url, PHP_URL_SCHEME);
          if ($host !== false && (!isset($site_host) || ($site_scheme === 'http' && $scheme === 'https'))) {
            $site_host = $host;
            $site_scheme = $scheme ?: 'http';
          }
        }
      }
    }

    // Change site URL per environment.
    define('WP_HOME', $site_scheme . '://' . $site_host);
    define('WP_SITEURL', WP_HOME);
}
// Since you can have multiple installations in one database, you need a unique
// prefix.
$table_prefix  = 'wp_';

// Default PHP settings.
ini_set('session.gc_probability', 1);
ini_set('session.gc_divisor', 100);
ini_set('session.gc_maxlifetime', 200000);
ini_set('session.cookie_lifetime', 2000000);
ini_set('pcre.backtrack_limit', 200000);
ini_set('pcre.recursion_limit', 200000);

/** Absolute path to the WordPress directory. */
if ( !defined('ABSPATH') )
  define('ABSPATH', dirname(__FILE__) . '/');

/** Sets up WordPress vars and included files. */
require_once(ABSPATH . 'wp-settings.php');