wp-config.php

<?php

require_once __DIR__ . "/vendor/autoload.php";

/**
 * Check if named .env.{$environment} exists
 *
 * @return {String} $environment
 */
$environment = function() {
  $stages = array(
    "development",
    "staging",
    "production"
  );

  foreach ( $stages as $stage ) {
    if ( file_exists(__DIR__ . "/.env.{$stage}") ) {
      return $stage;
    }
  }

  return false;
};

/**
 * Use Dotenv to set stage. Fall back to non-suffixed .env if a
 *  named stage was not found.
 */
try {
  if ( $stage = $environment() ) {
    Dotenv::load(__DIR__, ".env.{$stage}");
  } else {
    Dotenv::load(__DIR__);
  }
} catch (Exception $e) {
  // Continue to see if required ENV variables are set another way...
}

try {
  Dotenv::required(array(
    "DB_NAME",
    "DB_USER",
    "DB_PASSWORD",
    "DB_HOST",
    "WP_HOME",
    "WP_SITEURL"
  ));
} catch (Exception $e) {
  echo $e->getMessage();
  die;
}

/**
 * Stage
 */
define("WP_ENV", getenv("WP_ENV") ?: "development");

/**
 * Database
 */
define("DB_NAME", getenv("DB_NAME"));
define("DB_USER", getenv("DB_USER"));
define("DB_PASSWORD", getenv("DB_PASSWORD"));
define("DB_HOST", getenv("DB_HOST"));

/**
 * Debug
 *
 * This filters the WP_DEBUG declaration from .env.{stage} to a
 *  boolean. Accepts strings like 'true', 'yes', etc.
 *
 * @see http://php.net/manual/en/function.filter-var.php
 */
define("WP_DEBUG", filter_var(getenv("WP_DEBUG"), FILTER_VALIDATE_BOOLEAN));

/**
 * Cache
 *
 * This filters the WP_CACHE declaration from .env.{stage} to a
 *  boolean. Accepts strings like 'true', 'yes', etc.
 *
 * @see http://php.net/manual/en/function.filter-var.php
 */
define("WP_CACHE", filter_var(getenv("WP_CACHE"), FILTER_VALIDATE_BOOLEAN));

/**
 * Mailcatcher
 *
 * This filters the WP_MAILCATCHER declaration from .env.{stage} to a
 *  boolean. Accepts strings like 'true', 'yes', etc.
 *
 * @see https://wordpress.org/plugins/mailcatcher/
 */
if ( WP_ENV === "development" ) {
  define("WP_MAILCATCHER", filter_var(getenv("WP_MAILCATCHER"), FILTER_VALIDATE_BOOLEAN));
}

/**
 * URLs
 */
define("WP_HOME", getenv("WP_HOME"));
define("WP_SITEURL", getenv("WP_SITEURL"));

/**
 * Authentication Unique Keys and Salts
 */
define("AUTH_KEY", getenv("AUTH_KEY") ?: "");
define("SECURE_AUTH_KEY", getenv("SECURE_AUTH_KEY") ?: "");
define("LOGGED_IN_KEY", getenv("LOGGED_IN_KEY") ?: "");
define("NONCE_KEY", getenv("NONCE_KEY") ?: "");
define("AUTH_SALT", getenv("AUTH_SALT") ?: "");
define("SECURE_AUTH_SALT", getenv("SECURE_AUTH_SALT") ?: "");
define("LOGGED_IN_SALT", getenv("LOGGED_IN_SALT") ?: "");
define("NONCE_SALT", getenv("NONCE_SALT") ?: "");

/**
 * Database Charset to use in creating database tables.
 */
define("DB_CHARSET", "utf8");

/**
 * The Database Collate type. Don't change this if in doubt.
 */
define("DB_COLLATE", "");

/**
 * WordPress Database Table prefix.
 *
 * You can have multiple installations in one database if you give each a unique
 * prefix. Only numbers, letters, and underscores please!
 */
$table_prefix = getenv("DB_TABLE_PREFIX") ?: "wp_";

/**
 * WordPress Localized Language, defaults to English.
 *
 * Change this to localize WordPress. A corresponding MO file for the chosen
 * language must be installed to wp-content/languages. For example, install
 * de_DE.mo to wp-content/languages and set WPLANG to "de_DE" to enable German
 * language support.
 */
define("WPLANG", getenv("WP_LANG") ?: "");

/**
 * Custom content directory
 */
define("CONTENT_DIR", "/app");
define("WP_CONTENT_DIR", __DIR__ . CONTENT_DIR);
define("WP_CONTENT_URL", WP_HOME . CONTENT_DIR);

/**
 * Must-use plugins directory
 */
define("WPMU_PLUGIN_DIR", WP_CONTENT_DIR . "/mu-plugins");
define("WPMU_PLUGIN_URL", WP_CONTENT_URL . "/mu-plugins");

/**
 * Custom language directory
 *
 * @link http://svn.automattic.com/wordpress-i18n/
 * @link http://languages.koodimonni.fi/
 */
define("WP_LANG_DIR", WP_CONTENT_DIR . "/lang");

/**
 * Other settings
 */
define("WP_DEFAULT_THEME", "sprout");
define("DISALLOW_FILE_EDIT", true);
define("DISALLOW_FILE_MODS", true);
define("DISABLE_WP_CRON", true);

/**
 * Absolute path to WP
 */
if ( ! defined("ABSPATH") ) {
  define("ABSPATH", __DIR__ . "/wp/");
}

require_once ABSPATH . "wp-settings.php";