Wordpress config file w/ env support

wp-config.php

<?php

/**
 * Dynamic Wordpress Configuration File
 *
 * This config file is designed to be flexible for use in any environment without need for modification.
 * It exposes most configurations to being set externally, such as via SetEnv in Apache/htaccess or PHP's putenv().
 *
 * It will optionally load a /env.php file. If the file returns an array, the key/values will be loaded using putenv().
 *
 * In most environments, the only essential settings are DB_NAME, DB_USER, and DB_PASSWORD.
 */

/* Load Environment Vars */
$env = envLoad(__DIR__.'/env.php');

/* Environment Name */
define('WP_ENV', envGet('WP_ENV', 'production'));

/* Database Settings */
define('DB_HOST', envGet('DB_HOST', 'localhost'));
define('DB_NAME', envGet('DB_NAME', 'wordpress'));
define('DB_USER', envGet('DB_USER', 'root'));
define('DB_PASSWORD', envGet('DB_PASSWORD', ''));

define('DB_CHARSET', envGet('DB_CHARSET', 'utf8'));
define('DB_COLLATE', envGet('DB_COLLATE', ''));
$table_prefix = envGet('DB_PREFIX', 'wp_');

/* Auth Keys and Salts */
define('AUTH_KEY',          envGet('AUTH_KEY',        'SomeRandomlyGeneratedSecureSalt1'));
define('SECURE_AUTH_KEY',   envGet('SECURE_AUTH_KEY', 'SomeRandomlyGeneratedSecureSalt2'));
define('LOGGED_IN_KEY',     envGet('LOGGED_IN_KEY',   'SomeRandomlyGeneratedSecureSalt3'));
define('NONCE_KEY',         envGet('NONCE_KEY',       'SomeRandomlyGeneratedSecureSalt4'));
define('AUTH_SALT',         envGet('AUTH_SALT',       'SomeRandomlyGeneratedSecureSalt5'));
define('SECURE_AUTH_SALT',  envGet('SECURE_AUTH_SALT','SomeRandomlyGeneratedSecureSalt6'));
define('LOGGED_IN_SALT',    envGet('LOGGED_IN_SALT',  'SomeRandomlyGeneratedSecureSalt7'));
define('NONCE_SALT',        envGet('NONCE_SALT',      'SomeRandomlyGeneratedSecureSalt8'));

/* Debug Settings */
define('WP_DEBUG', envGet('WP_DEBUG', false));
define('SAVEQUERIES', envGet('SAVEQUERIES', false));
define('SCRIPT_DEBUG', envGet('SCRIPT_DEBUG', WP_DEBUG));
define('WP_DEBUG_LOG', envGet('WP_DEBUG_LOG', WP_DEBUG));
define('WP_DEBUG_DISPLAY', envGet('WP_DEBUG_DISPLAY', false));

/* Updating */
define('AUTOMATIC_UPDATER_DISABLED', envGet('AUTOMATIC_UPDATER_DISABLED', false));
define('DISALLOW_FILE_EDIT', envGet('DISALLOW_FILE_EDIT', false));
define('DISALLOW_FILE_MODS', envGet('DISALLOW_FILE_MODS', false));
define('WP_AUTO_UPDATE_CORE', envGet('WP_AUTO_UPDATE_CORE', 'minor'));

/* Other Settings */
define('WP_CACHE', envGet('WP_CACHE', false));
define('WP_MEMORY_LIMIT', envGet('WP_MEMORY_LIMIT', '128M'));
define('WP_MAX_MEMORY_LIMIT', envGet('WP_MAX_MEMORY_LIMIT', '512M'));
define('DISABLE_WP_CRON', envGet('DISABLE_WP_CRON', false));


/* Define Remaining Configs */
envDefine($env);
unset($env);


/* Env Functions */
function envLoad($envFile) {
    if(is_readable($envFile) && is_array($env = include $envFile)) {
        foreach($env as $key=>$val) {
            putenv("$key=$val");
        }
        return $env;
    }
    return [];
}
function envDefine($configs) {
    foreach($configs as $key=>$val) {
        if(!is_numeric($key) && !defined($key)) {
            define($key, $val);
        }
    }
}
function envGet($key, $default = null) {
    $value = getenv($key);
    if (!is_string($value)) {
        return $default;
    }
    switch (strtolower($value)) {
        case 'null':  return null;
        case 'true':  return true;
        case 'false': return false;
    }
    if (strpos($value, '"') === 0 && substr($value, -1) === '"') {
        return substr($value, 1, -1);
    }
    return $value;
}


/* That's all, stop editing! Happy blogging. */

/** 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');