The two snippets I add to almost every WP project I work on.

Standard WP-Config setup

// set environment based on server name

switch($_SERVER['SERVER_NAME']){
  case "issunboshi.test.com":
    define('base_path', './');
    define('env_debug', true); //Define error message setting based on environment
    define('environment', 'issunboshi'); //Define name of each environment
  break;
  case "another_user.test.com":
    define('base_path', './');
    define('env_debug', true);
    define('environment', 'another_user');
  break;
  case "xx.test-server.co.uk":
    define('base_path', './');
    define('env_debug', false);
    define('environment', 'dev');
  break;
  case "www.test.com":
  default:
    define('base_path', './');
    define('env_debug', false);
    define('environment', 'live');
  break;
}

switch(environment){
  case 'issunboshi':
    define('DB_NAME', 'db_xx');
  
  	/** MySQL database username */
  	define('DB_USER', 'xx');
  
  	/** MySQL database password */
  	define('DB_PASSWORD', 'xx');
  
  	/** MySQL hostname */
  	define('DB_HOST', 'localhost');
  break;
  case 'other_user':
  	define('DB_NAME', 'xx');
  
  	/** MySQL database username */
  	define('DB_USER', 'xx');
  
  	/** MySQL database password */
  	define('DB_PASSWORD', 'xx');
  
  	/** MySQL hostname */
  	define('DB_HOST', 'localhost');
  break;
  case 'dev':
  	define('DB_NAME', 'test');
  
  	/** MySQL database username */
  	define('DB_USER', 'test');
  
  	/** MySQL database password */
  	define('DB_PASSWORD', 'xxxx');
  
  	/** MySQL hostname */
  	define('DB_HOST', 'localhost');
  break;
  case 'live':
  default:
  	define('DB_NAME', 'xx');
  
  	/** MySQL database username */
  	define('DB_USER', 'xx');
  
  	/** MySQL database password */
  	define('DB_PASSWORD', 'xx');
  
  	/** MySQL hostname */
  	define('DB_HOST', 'xx');
  break;
}


//Change default wp-content file name & location
define ('WP_CONTENT_DIR', $_SERVER['DOCUMENT_ROOT'].'/YOUR_NAME_HERE');
define ('WP_CONTENT_URL', $_SERVER['SERVER_NAME'].'/YOUR_NAME_HERE');