Common wp-config.php

wp-config.php

<?php

switch ($_SERVER['HTTP_HOST']) {
    case 'dev.mydomain.com':
        define('DB_NAME', '' );
        define('DB_USER', '' );
        define('DB_PASSWORD', '' );
        define('DB_HOST', '127.0.0.1' );
        define('WP_CACHE', false);
        define('WP_DEBUG', true);
        define('WP_HOME', 'http://dev.mydomain.com' );
        define('WP_SITEURL', 'http://dev.mydomain.com' );
        break;
    case 'staging.mydomain.com':
        define('DB_NAME', '' );
        define('DB_USER', '' );
        define('DB_PASSWORD', '' );
        define('DB_HOST', '127.0.0.1' );
        define('WP_CACHE', true);
        define('WP_DEBUG', true);
        define('WP_HOME', 'http://staging.mydomain.com' );
        define('WP_SITEURL', 'http://staging.mydomain.com' );
        break;
    default:
        define('DB_NAME', '' );
        define('DB_USER', '' );
        define('DB_PASSWORD', '' );
        define('DB_HOST', '127.0.0.1' );
        define('WP_DEBUG', false);
        define('WP_HOME', 'http://www.mydomain.com' );
        define('WP_SITEURL', 'http://www.mydomain.com' );
}

# Database and Server Configuration
define('AUTOSAVE_INTERVAL', 300);
define('DB_CHARSET', 'utf8');
define('DB_COLLATE', 'utf8_unicode_ci');
define('DISABLE_WP_CRON', false);
define('DISALLOW_FILE_MODS', false);
define('DISALLOW_FILE_EDIT', false);
define('EMPTY_TRASH_DAYS', 5);         
define('FS_METHOD', 'direct');
define('FS_CHMOD_DIR', 0775);
define('FS_CHMOD_FILE', 0664);
define('FORCE_SSL_LOGIN', false);
define('WP_AUTO_UPDATE_CORE', true);
define('WP_MAX_MEMORY_LIMIT', '256M');
define('WP_MEMORY_LIMIT', '256M');
define('WP_POST_REVISIONS', 20);
$table_prefix = 'md_';