README

Modern cookie management for PHP

Requirements

• PHP 5.4.0+

Installation

1. Include the library via Composer [?]:

   $ composer require delight-im/cookie
   

2. Include the Composer autoloader:

   require __DIR__ . '/vendor/autoload.php';

Upgrading

Migrating from an earlier version of this project? See our upgrade guide for help.

Usage

Static method

This library provides a static method that is compatible to PHP’s built-in setcookie(...) function but includes support for more recent features such as the SameSite attribute:

\Delight\Cookie\Cookie::setcookie('SID', '31d4d96e407aad42');
// or
\Delight\Cookie\Cookie::setcookie('SID', '31d4d96e407aad42', time() + 3600, '/~rasmus/', 'example.com', true, true, 'Lax');

Builder pattern

Instances of the Cookie class let you build a cookie conveniently by setting individual properties. This class uses reasonable defaults that may differ from defaults of the setcookie function.

$cookie = new \Delight\Cookie\Cookie('SID');
$cookie->setValue('31d4d96e407aad42');
$cookie->setMaxAge(60 * 60 * 24);
// $cookie->setExpiryTime(time() + 60 * 60 * 24);
$cookie->setPath('/~rasmus/');
$cookie->setDomain('example.com');
$cookie->setHttpOnly(true);
$cookie->setSecureOnly(true);
$cookie->setSameSiteRestriction('Strict');

// echo $cookie;
// or
$cookie->save();
// or
// $cookie->saveAndSet();

The method calls can also be chained:

(new \Delight\Cookie\Cookie('SID'))->setValue('31d4d96e407aad42')->setMaxAge(60 * 60 * 24)->setSameSiteRestriction('None')->save();

A cookie can later be deleted simply like this:

$cookie->delete();
// or
$cookie->deleteAndUnset();

Note: For the deletion to work, the cookie must have the same settings as the cookie that was originally saved – except for its value, which doesn’t need to be set. So you should remember to pass appropriate values to setPath(...), setDomain(...), setHttpOnly(...) and setSecureOnly(...) again.

Reading cookies

• Checking whether a cookie exists:

  \Delight\Cookie\Cookie::exists('first_visit');

• Reading a cookie’s value (with optional default value):

  \Delight\Cookie\Cookie::get('first_visit');
  // or
  \Delight\Cookie\Cookie::get('first_visit', \time());

Managing sessions

Using the Session class, you can start and resume sessions in a way that is compatible to PHP’s built-in session_start() function, while having access to the improved cookie handling from this library as well:

// start session and have session cookie with 'lax' same-site restriction
\Delight\Cookie\Session::start();
// or
\Delight\Cookie\Session::start('Lax');

// start session and have session cookie with 'strict' same-site restriction
\Delight\Cookie\Session::start('Strict');

// start session and have session cookie without any same-site restriction
\Delight\Cookie\Session::start(null);
// or
\Delight\Cookie\Session::start('None'); // Chrome 80+

All three calls respect the settings from PHP’s session_set_cookie_params(...) function and the configuration options session.name, session.cookie_lifetime, session.cookie_path, session.cookie_domain, session.cookie_secure, session.cookie_httponly and session.use_cookies.

Likewise, replacements for

session_regenerate_id();
// and
session_regenerate_id(true);

are available via

\Delight\Cookie\Session::regenerate();
// and
\Delight\Cookie\Session::regenerate(true);

if you want protection against session fixation attacks that comes with improved cookie handling.

Additionally, access to the current internal session ID is provided via

\Delight\Cookie\Session::id();

as a replacement for

session_id();

Reading and writing session data

• Read a value from the session (with optional default value):

  $value = \Delight\Cookie\Session::get($key);
  // or
  $value = \Delight\Cookie\Session::get($key, $defaultValue);

• Write a value to the session:

  \Delight\Cookie\Session::set($key, $value);

• Check whether a value exists in the session:

  if (\Delight\Cookie\Session::has($key)) {
      // ...
  }

• Remove a value from the session:

  \Delight\Cookie\Session::delete($key);

• Read and then immediately remove a value from the session:

  $value = \Delight\Cookie\Session::take($key);
  $value = \Delight\Cookie\Session::take($key, $defaultValue);

  This is often useful for flash messages, e.g. in combination with the has(...) method.

Parsing cookies

$cookieHeader = 'Set-Cookie: test=php.net; expires=Thu, 09-Jun-2016 16:30:32 GMT; Max-Age=3600; path=/~rasmus/; secure';
$cookieInstance = \Delight\Cookie\Cookie::parse($cookieHeader);

Specifications

• RFC 2109
• RFC 6265
• Same-site Cookies (formerly 2016-06-20 and 2016-04-06)
  • Amendment: Default to Lax and require secure attribute for None (Note: There are incompatible clients)

Contributing

All contributions are welcome! If you wish to contribute, please create an issue first so that your feature, problem or question can be discussed.

License

This project is licensed under the terms of the MIT License.