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Importing cookie content

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Will Rossiter 2014-11-15 12:58:31 +13:00 committed by Cam Findlay
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docs/en/02_Developer_Guides/18_Cookies_And_Sessions/01_Cookies.md
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@ -4,6 +4,7 @@ summary: A set of static methods for manipulating PHP cookies.
# Cookies
Cookies are a mechanism for storing data in the remote browser and thus tracking or identifying return users.
SilverStripe uses cookies for remembering users preferences. Application code can modify a users cookies through
the [api:Cookie] class. This class mostly follows the PHP API.
@ -35,6 +36,68 @@ Clears a given cookie.
// Cookie::force_expiry('MyApplicationPreference')
## Cookie_Backend
The [api:Cookie] class manipulates and sets cookies using a [api:Cookie_Backend]. The backend is in charge of the logic
that fetches, sets and expires cookies. By default we use a [api:CookieJar] backend which uses PHP's
[setcookie](http://www.php.net/manual/en/function.setcookie.php) function.
The [api:CookieJar] keeps track of cookies that have been set by the current process as well as those that were received
from the browser.
:::php
$myCookies = array(
'cookie1' => 'value1',
);
$newBackend = new CookieJar($myCookies);
Injector::inst()->registerService($newBackend, 'Cookie_Backend');
Cookie::get('cookie1');
## Resetting the Cookie_Backend state
Assuming that your application hasn't messed around with the `$_COOKIE` superglobal, you can reset the state of your
`Cookie_Backend` by simply unregistering the `CookieJar` service with `Injector`. Next time you access `Cookie` it'll
create a new service for you using the `$_COOKIE` superglobal.
:::php
Injector::inst()->unregisterNamedObject('Cookie_Backend');
Cookie::get('cookiename'); // will return $_COOKIE['cookiename'] if set
Alternatively, if you know that the superglobal has been changed (or you aren't sure it hasn't) you can attempt to use
the current `CookieJar` service to tell you what it was like when it was registered.
:::php
//store the cookies that were loaded into the `CookieJar`
$recievedCookie = Cookie::get_inst()->getAll(false);
//set a new `CookieJar`
Injector::inst()->registerService(new CookieJar($recievedCookie), 'CookieJar');
### Using your own Cookie_Backend
If you need to implement your own Cookie_Backend you can use the injector system to force a different class to be used.
:::yml
---
Name: mycookie
After: '#cookie'
---
Injector:
Cookie_Backend:
class: MyCookieJar
To be a valid backend your class must implement the [api:Cookie_Backend] interface.
## API Documentation
* [api:Cookie]
* [api:Cookie]
* [api:CookieJar]
* [api:CookieBackend]