Version 3 end of life
This version of Silverstripe CMS will not recieve any additional bug fixes or documentation updates. Go to documentation for the most recent stable version.




  • "Split view" editing with side-by-side preview of the edited website
  • Resizing of preview to common screen widths ("desktop", "tablet" and "smartphone")
  • Decluttered "Edit Page" buttons by moving minor actions into a "more options" panel
  • Auto-detect CMS changes and highlight the save button for better informancy
  • New context action "Show children as list" on tree for better management on large sites
  • CMS form fields now support help text through setDescription(), both inline and as tooltips
  • Removed SiteTree "MetaTitle" and "MetaKeywords" fields
  • More legible and simplified tab and menu styling in the CMS
  • Dropped support for Internet Explorer 7
  • Added support for Internet Explorer 10 (in "classic"/desktop mode)


  • Security: Require ADMIN for ?flush=1 (stop denial of service attacks) (#1692)
  • Static properties are immutable and private, you must use Config API
  • Statics in custom Page classes need to be "private"
  • $default_cast is now Text instead of HTMLText, to secure templates from XSS by default
  • Shortcodes are no longer supported in template files (still works in DB fields and through HTMLText casting)
  • DataList and ArrayList are now immutable, they'll return cloned instances on modification
  • Removed legacy table APIs (e.g. TableListField), use GridField instead
  • Deny URL access if Controller::$allowed_actions is undefined
  • Removed support for "*" rules in Controller::$allowed_actions
  • Removed support for overriding rules on parent classes through Controller::$allowed_actions
  • RestfulService verifies SSL peers by default
  • UploadField functions on new records
  • Editing of relation table data ($many_many_extraFields) in GridField
  • Optional integration with ImageMagick as a new image manipulation backend
  • Support for PHP 5.4's built-in webserver
  • Support for Composer dependency manager (also works with 3.0)
  • Added support for filtering incoming HTML from TinyMCE (disabled by default, see security)
  • Behaviour testing support through Behat, with CMS test coverage (see the SilverStripe Behat Extension for details)


Security: Require ADMIN for ?flush=1

Flushing the various manifests (class, template, config) is performed through a GET parameter (flush=1). Since this action requires more server resources than normal requests, it can facilitate denial-of-service attacks.

To prevent this, main.php now checks and only allows the flush parameter in the following cases:

  • The environment is in "dev mode"
  • A user is logged in with ADMIN permissions
  • An error occurs during startup

This applies to both flush=1 and flush=all (technically we only check for the existence of any parameter value) but only through web requests made through main.php - CLI requests, or any other request that goes through a custom start up script will still process all flush requests as normal.


Statics in custom Page classes need to be "private"

Requires action on every SilverStripe installation.

Typical error message: Access level to ErrorPage::$db must be public

Related to the configuration change described above, many statics in core are now marked with private visibility. While PHP allows making variables more visible (e.g. from "private" to "public"), it complains if you try to restrict visibility in subclasses. The core framework extends from the Page class in your own codebase (mysite/), which means you need to change those statics to private yourself. The same rules apply to controllers subclassd from Page_Controller.


class Page extends SiteTree {
	static $db = array('MyVar' => 'Text');
class Page_Controller extends ContentController {
	static $allowed_actions = array('myaction');


class Page extends SiteTree {
	private static $db = array('MyVar' => 'Text');
class Page_Controller extends ContentController {
	private static $allowed_actions = array('myaction');

Most statics defined in SiteTree and DataObject are affected, for example: $db, $has_one, $has_many, $many_many, $defaults, $allowed_children. The same goes for statics defined in ContentController, e.g. $allowed_actions.

Classes which are not further extended by the core (e.g. all custom DataObject subclasses) are not affected by this change, although we recommend to mark those inherited statics as private as well, to make it clear that they should be accessed through the Config API.

default_cast is now Text

In order to reduce the chance of accidentally allowing XSS attacks, the value of default_cast has been changed in 3.1 from HTMLText to Text. This means that any values used in a template that haven't been explicitly cast as safe will be escaped (< replaced with &lt; etc).

When upgrading, if methods return HTML fragments they need to explicitly cast them as such. This can either be done by returning an HTMLText object, like:

return DBField::create_field('HTMLText', '<div></div>');

or by defining the casting of the accessor method, like:

class Page extends SiteTree {
	private static $casting = array(
		'MyDiv' => 'HTMLText'

	function MyDiv() {
		return '<div></div>';

SSViewer#process (and as a result ViewableData#renderWith) have been changed to already return explicitly cast HTMLText instances, so functions that return the result of these methods won't have to do any additional casting.

Note that this change means that if code was testing the result via is_string, that is no longer reliable.

Static properties are immutable and private, you must use Config API.

A common SilverStripe pattern is to use a static variable on a class to define a configuration parameter. The configuration system added in SilverStripe 3.0 builds on this by using this static variable as a way of defining the default value.

In SilverStripe 3.0, it was possible to edit this value at run-time and have the change propagate into the configuration system. This is no longer the case, for performance reasons. We've marked all "configurable" statics as private, so you can't set or retrieve their value directly. When using static setters or getters, the system throws a deprecation warning. Notable exceptions to this rule are all static setters which accept objects, such as SS_Cache::add_backend().

Please change all run-time manipulation of configuration to use Config::inst()->update() or $this->config()->update(). You can keep using procedural configuration through _config.php through this new notation, although its encouraged to use the (faster) YAML config wherever possible. For this purpose, we have added a mysite/_config/config.yml file.

Here's an example on how to rewrite a common _config.php configuration:

global $project;
$project = 'mysite';

global $database;
$database = 'SS_mydb';


if(class_exists('SiteTree')) SiteTree::enable_nested_urls();

if(Director::isLive()) Email::setAdminEmail('');

if(is_defined('MY_REDIRECT_EMAILS')) Email::send_all_emails_to('');

SS_Log::add_writer(new SS_LogFileWriter(BASE_PATH . '/mylog.log'), SS_Log::WARN);

if(strpos('Internet Explorer', $_SERVER['HTTP_USER_AGENT']) !== false) {

Object::add_extension('Member', 'MyMemberExtension');

The upgraded _config.php:

global $project;
$project = 'mysite';

global $database;
$database = 'SS_mydb';


// Removed SiteTree::enable_nested_urls() since its configured by default

// Requires PHP objects, keep in PHP config
SS_Log::add_writer(new SS_LogFileWriter(BASE_PATH . '/mylog.log'), SS_Log::WARN);	
// Non-trivial conditional, keep in PHP config
if(strpos('Internet Explorer', $_SERVER['HTTP_USER_AGENT']) !== false) {
	// Overwrites any earlier YAML config
	Config::inst()->update('SSViewer'. 'theme', 'basic');

The upgraded config.yml:

Name: mysite
After: 'framework/*','cms/*'
  theme: 'simple'
    - MyMemberExtension
  environment: 'live'
  admin_email: ''

Some examples of changed notations (not exhaustive, there's over a hundred in total):

  • SSViewer::set_theme(): Use SSViewer.theme instead
  • SecurityAdmin::$hidden_permissions: Use Permission.hidden_permissions instead
  • Director::setBaseFolder: Use Director.alternate_base_folder instead
  • Director::setBaseURL: Use Director.alternate_base_url instead
  • SSViewer::setOption('rewriteHashlinks', ...): Use SSViewer.rewrite_hashlinks instead

[warning] Please remember to upgrade the installer project as well, particularly your .htaccess or web.config files. Web access to these sensitive YAML configuration files needs to be explicitly denied through these configuration files (see the 3.0.5 security release) for details. [/warning]

For more information about how to use the config system, see the "Configuration" topic.

Deny URL access if Controller::$allowed_actions is undefined or empty array

In order to make controller access checks more consistent and easier to understand, the routing will require definition of $allowed_actions on your own Controller subclasses if they contain any actions accessible through URLs.

class MyController extends Controller {
	// This action is now denied because no $allowed_actions are specified
	public function myaction($request) {}

You can overwrite the default behaviour on undefined $allowed_actions to allow all actions, by setting the RequestHandler.require_allowed_actions config value to false (not recommended).

This applies to anything extending RequestHandler, so please check your Form and FormField subclasses as well. Keep in mind, action methods as denoted through FormAction names should NOT be mentioned in $allowed_actions to avoid CSRF issues. Please review all rules governing allowed actions in the "controller" topic.

Removed support for "*" rules in Controller::$allowed_actions

The wildcard ('*') character allowed to define fallback rules in case they weren't explicitly defined. This caused a lot of confusion, particularly around inherited rules. We've decided to remove the feature, you'll need to specificy each accessible action individually.

class MyController extends Controller {
	public static $allowed_actions = array('*' => 'ADMIN');
	// Always denied because not explicitly listed in $allowed_actions
	public function myaction($request) {}
	// Always denied because not explicitly listed in $allowed_actions
	public function myotheraction($request) {}

Please review all rules governing allowed actions in the "controller" topic.

Removed support for overriding rules on parent classes through Controller::$allowed_actions

Since 3.1, the $allowed_actions definitions only apply to methods defined on the class they're also defined on. Overriding inherited access definitions is no longer possible.

class MyController extends Controller {
	public static $allowed_actions = array('myaction' => 'ADMIN');
	public function myaction($request) {}
class MySubController extends MyController {
	// No longer works
	public static $allowed_actions = array('myaction' => 'CMS_ACCESS_CMSMAIN');

This also applies for custom implementations of handleAction() and handleRequest(), which now have to be listed in the $allowed_actions specifically. It also restricts Extension classes applied to controllers, which now can only grant or deny access or methods they define themselves.

New approach with the Config API

class MySubController extends MyController {
	public function init() {

		Config::inst()->update('MyController', 'allowed_actions',
			array('myaction' => 'CMS_ACCESS_CMSMAIN')

Please review all rules governing allowed actions in the "controller" topic.

Grouped CMS Buttons

The CMS buttons are now grouped, in order to hide minor actions by default and declutter the interface. This required changing the form field structure from a simple FieldList to a FieldList which contains a CompositeField for all "major actions", and a TabSet with a single tab for all "minor actions". If you have previously added, removed or altered built-in CMS actions in any way, you'll need to adjust your code.

class MyPage extends Page {
	function getCMSActions() {
		$actions = parent::getCMSActions();

		// Inserting a new toplevel action (old)
		$actions->push(new FormAction('MyAction')); 

		// Inserting a new toplevel action (new)
		$actions->insertAfter(new FormAction('MyAction'), 'MajorActions');

		// Removing an action, both toplevel and nested (no change required)

		// Inserting a new minor action (new)
			new FormAction('MyMinorAction')

		// Finding a toplevel action (no change required)
		$match = $actions->dataFieldByName('action_save');

		// Finding a nested action (new)
		$match = $actions->fieldByName('ActionMenus.MoreOptions')

		return $actions;

GridField and ModelAdmin Permission Checks

GridFieldDetailForm now checks for canEdit() and canDelete() permissions on your model. GridFieldAddNewButton checks canCreate(). The default implementation requires ADMIN permissions. You'll need to loosen those permissions if you want other users with CMS access to interact with your data. Since GridField is used in ModelAdmin, this change will affect both classes.

Example: Require "CMS: Pages section" access

class MyModel extends DataObject {
	public function canView($member = null) {
		return Permission::check('CMS_ACCESS_CMSMain', 'any', $member);
	public function canEdit($member = null) {
		return Permission::check('CMS_ACCESS_CMSMain', 'any', $member);
	public function canDelete($member = null) {
		return Permission::check('CMS_ACCESS_CMSMain', 'any', $member);
	public function canCreate($member = null) {
		return Permission::check('CMS_ACCESS_CMSMain', 'any', $member);

You can also implement custom permission codes. For 3.1.0 stable, we aim to further simplify the permission definitions, in order to reduce the boilerplate code required to get a model editable in the CMS.

Note: GridField is already relying on the permission checks performed through the CMS controllers, providing a simple level of security.

RestfulService verifies SSL peers by default

This makes the implementation "secure by default", by removing the call to curl_setopt(CURLOPT_SSL_VERIFYPEER, false). Failing to validate SSL peers makes HTTP requests vulnerable to man in the middle attacks. The underlying curl library relies on the operating system for the resulting CA certificate verification. On some systems (mainly Windows), these certificates are not available on a standard PHP installation, and need to be added manually through CURLOPT_CAINFO. Although it is not recommended, you can restore the old insecure behaviour with the following configuration: RestfulService::set_default_curl_option(CURLOPT_SSL_VERIFYPEER, false).

Deprecation API

The Deprecation API generates deprecation notices to help you future-proof your code.
Calls to ceprecated methods will only produce errors if the API was deprecated in the release equal to or earlier than the "notification version" (currently set to "3.1.0").

If you change the notification version to 3.1.0-dev, then only methods deprecated in older versions (e.g. 3.0) will trigger notices, and the other methods will silently pass. This can be useful if you don't yet have time to remove all calls to deprecated methods.


On the other hand, if you want to identify which APIs will be removed in the next minor release (3.2.0), you can enable those warnings and future-proof your code already.



  • TableListField, ComplexTableField, TableField, HasOneComplexTableField, HasManyComplexTableField and ManyManyComplexTableField have been removed from the core and placed into a module called "legacytablefields" located at
  • prototype.js and behaviour.js have been removed from the core, they are no longer used. If you have custom code relying on these two libraries, please update your code to include the files yourself
  • Removed SiteTree.MetaKeywords since they are irrelevant in terms of SEO (seomoz article) and general page informancy
  • Removed SiteTree.MetaTitle as a means to customise the window title, use SiteTree.Title instead
  • Deprecated Profiler class, use third-party solutions like xhprof
  • Removed defunct or unnecessary debug GET parameters: debug_profile, debug_memory, profile_trace, debug_javascript, debug_behaviour
  • Removed Member_ProfileForm, use CMSProfileController instead
  • SiteTree::$nested_urls enabled by default. To disable, call SiteTree::disable_nested_urls().
  • Removed CMS permission checks from File->canEdit() and File->canDelete(). If you have unsecured controllers relying on these permissions, please override them through a DataExtension.
  • Moved email bounce handling to new "emailbouncehandler" module, including Email_BounceHandler and Email_BounceRecord classes, as well as the Member->Bounced property.
  • Deprecated global email methods htmlEmail() and plaintextEmail, as well as various email helper methods like encodeMultipart(). Use the Email API, or the Mailer class where applicable.
  • Removed non-functional $inlineImages option for sending emails
  • Removed support for keyed arrays in SelectionGroup, use new SelectionGroup_Item object to populate the list instead (see API docs).
  • FormField->setDescription() now renders in a <span class="description"> by default, rather than a title attribute * Removed Form->Name(): Use getName()
  • Removed FormField->setContainerFieldSet(): Use setContainerFieldList()
  • Removed FormField->rootFieldSet(): Use rootFieldList()
  • Removed Group::map(): Use DataList::("Group")->map()
  • Removed Member->generateAutologinHash(): Tokens are no longer saved directly into the database in plaintext. Use the return value of the Member::generateAutologinTokenAndHash to get the token
  • Removed Member->sendInfo(): use Member_ChangePasswordEmail or Member_ForgotPasswordEmail directly
  • Removed SQLMap::map(): Use DataList::("Member")->map()
  • Removed SQLMap::mapInGroups(): Use Member::map_in_groups()
  • Removed PasswordEncryptor::register()/unregister(): Use config system instead
  • Methods on DataList and ArrayList that used to both modify the existing list & return a new version now just return a new version. Make sure you change statements like $list->filter(...) to $list = $list->filter(...) for these methods:

    • ArrayList#reverse
    • ArrayList#sort
    • ArrayList#filter
    • ArrayList#exclude
    • DataList#where
    • DataList#limit
    • DataList#sort
    • DataList#addFilter
    • DataList#applyFilterContext
    • DataList#innerJoin
    • DataList#leftJoin
    • DataList#find
    • DataList#byIDs
    • DataList#reverse
  • DataList#dataQuery has been changed to return a clone of the query, and so can't be used to modify the list's query directly. Use DataList#alterDataQuery instead to modify dataQuery in a safe manner.
  • ScheduledTask, QuarterHourlyTask, HourlyTask, DailyTask, MonthlyTask, WeeklyTask and YearlyTask are deprecated, please extend from BuildTask or CliController, and invoke them in self-defined frequencies through Unix cronjobs etc.
  • i18n::$common_locales and i18n::$common_languages are now accessed via the Config API, and contain associative rather than indexed arrays. Before: array('de_DE' => array('German', 'Deutsch')), After: array('de_DE' => array('name' => 'German', 'native' => 'Deutsch')).
  • SSViewer::current_custom_theme() has been replaced with the SSViewer.theme_enabled configuration setting. Please use it to toggle theme behaviour rather than relying on the custom theme being set in the (now deprecated) SSViewer::set_theme() call.
  • Scaffolded DateField, TimeField and DatetimeField form field instances automatically include formatting hints as placeholders and description text below the field itself. If you change the date/time format of those fields, you need to adjust the hints. To remove the hints, use setDescription(null) and setAttribute('placeholder', null).
  • Changed the way FreeStrings in SSTemplateParser are recognized, they will now also break on inequality operators (<, >). If you use inequality operators in free strings in comparisions like <% if Some<String == Some>Other>String %>...<% end_if %> you have to replace them with explicitly markes strings like <% if "Some<String" == "Some>Other>String" %>...<% end_if %>. This change was necessary in order to support inequality operators in comparisons in templates
  • Hard limit displayed pages in the CMS tree to 500, and the number of direct children to 250, to avoid excessive resource usage. Configure through Hierarchy.node_threshold_total and Hierarchy.node_threshold_leaf. Set to 0 to show tree unrestricted.
  • Object now has beforeExtending and afterExtending to inject behaviour around method extension. DataObject also has beforeUpdateCMSFields to insert fields between automatic scaffolding and extension by updateCMSFields. See the DataExtension Reference for more information.
  • Magic quotes is now deprecated. Will trigger user_error on live sites, as well as an error on new installs
  • Support for Apache 1.x is removed.
  • Forms created in the CMS should now be instances of a new CMSForm class, and have the CMS controller's response negotiator passed into them. Example: $form = new CMSForm(...); $form->setResponseNegotiator($this->getResponseNegotiator());