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Upgrade Guide

Upgrading to V4

So you have decided to upgrade to v4! Congratulations!!

Phalcon v4 contains a lot of changes to components, including changes to interfaces, strict types, removal of components and additions of new ones. This document is an effort to help you upgrade your existing Phalcon application to v4. We will outline the areas that you need to pay attention to and make necessary alterations so that your code can run as smoothly as it has been with v3. Although the changes are significant, it is more of a methodical task than a daunting one.


PHP 7.2

Phalcon v4 supports only PHP 7.2 and above. PHP 7.1 was released 2 years ago and its active support has lapsed, so we decided to follow actively supported PHP versions.


Phalcon requires the PSR extension. The extension can be downloaded and compiled from this GitHub repository. Installation instructions are available in the README of the repository. Once the extension has been compiled and is available in your system, you will need to load it to your php.ini. You will need to add this line:


Alternatively some distributions add a number prefix on ini files. If that is the case, choose a high number for Phalcon (e.g. 50-phalcon.ini).


Download the latest zephir.phar from here. Add it to a folder that can be accessed by your system.

Clone the repository

git clone

Compile Phalcon

cd cphalcon/
git checkout tags/v4.0.0 ./
zephir fullclean
zephir build

Check the module

php -m | grep phalcon

General Notes


  • The Phalcon\Mvc\Application, Phalcon\Mvc\Micro and Phalcon\Mvc\Router now must have a URI to process


  • Changed catch Exception to Throwable



The ACL component has had some methods and components renamed. The functionality remains the same as in previous versions.


The components needed for the ACL to work have been renamed. In particular Resource has been renamed to Component in all relevant interfaces, classes and methods that this component uses.

  • Added Phalcon\Acl\Adapter\AbstractAdapter
  • Added Acl\Enum

  • Removed Phalcon\Acl

  • Removed Phalcon\Acl\Adapter

  • Renamed Phalcon\Acl\Resource to Phalcon\Acl\Component

  • Renamed Phalcon\Acl\ResourceInterface to Phalcon\Acl\ComponentInterface
  • Renamed Phalcon\Acl\ResourceAware to Phalcon\Acl\ComponentAware
  • Renamed Phalcon\Acl\AdapterInterface::isResource to Phalcon\Acl\AdapterInterface::isComponent
  • Renamed Phalcon\Acl\AdapterInterface::addResource to Phalcon\Acl\AdapterInterface::addComponent
  • Renamed Phalcon\Acl\AdapterInterface::addResourceAccess to Phalcon\Acl\AdapterInterface::addComponentAccess
  • Renamed Phalcon\Acl\AdapterInterface::dropResourceAccess to Phalcon\Acl\AdapterInterface::dropComponentAccess
  • Renamed Phalcon\Acl\AdapterInterface::getActiveResource to Phalcon\Acl\AdapterInterface::getActiveComponent
  • Renamed Phalcon\Acl\AdapterInterface::getResources to Phalcon\Acl\AdapterInterface::getComponents
  • Renamed Phalcon\Acl\Adapter::getActiveResource to Phalcon\Acl\AdapterInterface::getActiveComponent
  • Renamed Phalcon\Acl\Adapter\Memory::isResource to Phalcon\Acl\Adapter\Memory::isComponent
  • Renamed Phalcon\Acl\Adapter\Memory::addResource to Phalcon\Acl\Adapter\Memory::addComponent
  • Renamed Phalcon\Acl\Adapter\Memory::addResourceAccess to Phalcon\Acl\Adapter\Memory::addComponentAccess
  • Renamed Phalcon\Acl\Adapter\Memory::dropResourceAccess to Phalcon\Acl\Adapter\Memory::dropComponentAccess
  • Renamed Phalcon\Acl\Adapter\Memory::getResources to Phalcon\Acl\Adapter\Memory::getComponents


  • Added getActiveKey, activeFunctionCustomArgumentsCount and getActiveFunction to get latest key, number of custom arguments, and function used to acquire access
  • Added addOpertion support multiple inherited

Acl\Enum (Constants)


use Phalcon\Acl\Enum;

echo Enum::ALLOW; //prints 1
echo Enum::DENY;  //prints 0


CSS and JS filters have been removed from the Assets component. Due to license limitations, the CSS and JS minifiers (filters) have been removed for v4. In future versions with the help of the community we can introduce these filters again. You can always implement your own using the supplied Phalcon\Assets\FilterInterface.

  • Removed Phalcon\Assets\Filters\CssMin
  • Removed Phalcon\Assets\Filters\JsMin
  • Renamed Phalcon\Assets\Resource to Phalcon\Assets\Asset
  • Renamed Phalcon\Assets\ResourceInterface to Phalcon\Assets\AssetInterface
  • Renamed Phalcon\Assets\Manager::addResource to Phalcon\Assets\Manager::addAsset
  • Renamed Phalcon\Assets\Manager::addResourceByType to Phalcon\Assets\Manager::addAssetByType
  • Renamed Phalcon\Assets\Manager::collectionResourcesByType to Phalcon\Assets\Manager::collectionAssetsByType


xcache, apc and memcache adapters have been deprecated and removed. The first two are not supported for PHP 7.2+. apc has been replaced with apcu and memcache can be replaced with the libmemcached one.

  • Removed Phalcon\Annotations\Adapter\Apc
  • Removed Phalcon\Annotations\Adapter\Xcache
  • Removed Phalcon\Cache\Backend\Apc
  • Removed Phalcon\Cache\Backend\Memcache
  • Removed Phalcon\Cache\Backend\Xcache
  • Removed Phalcon\Mvc\Model\Metadata\Apc
  • Removed Phalcon\Mvc\Model\Metadata\Memcache
  • Removed Phalcon\Mvc\Model\Metadata\Xcache

The Cache component has been rewritten to comply with PSR-16. This allows you to use the Phalcon\Cache to any application that utilizes a PSR-16 cache, not just Phalcon based ones.

In v3, the cache was split into two components, the Frontend and the Backend. This did create a bit of confusion, but it was functional. In order to create a cache component you had to create the Frontend first and then inject that to the relevant Backend (which acted as an adapter also).

For v4, we rewrote the component completely. We first created a Storage class which is the basis of the Cache classes. We created Serializer classes whose sole responsibility is to serialize and unserialize the data before they are saved in the cache adapter and after they are retrieved. These classes are injected (based on the developer's choice) to an Adapter object which connects to a backend (Memcached, Redis etc.), while abiding by a common adapter interface.

The Cache class implements PSR-16 and accepts an adapter in its constructor, which in turn is doing all the heavy lifting with connecting to the back end and manipulating data.

For a more detailed explanation on how the new Cache component works, please visit the relevant page in our documentation.

Creating a Cache


use Phalcon\Cache;
use Phalcon\Cache\AdapterFactory;
use Phalcon\Storage\Serializer\SerializerFactory;

$serializerFactory = new SerializerFactory();
$adapterFactory    = new AdapterFactory($serializerFactory);

$options = [
    'defaultSerializer' => 'Json',
    'lifetime'          => 7200

$adapter = $adapterFactory->newInstance('apcu', $options);

$cache = new Cache($adapter);

Registering it in the DI


use Phalcon\Cache;
use Phalcon\Cache\AdapterFactory;
use Phalcon\Storage\Serializer\SerializerFactory;

$container = new Di();

    function () {
        $options = [
            'defaultSerializer' => 'Json',
            'lifetime'          => 7200

        $adapter = (new AdapterFactory(new SerializerFactory()))
                    ->newInstance('apcu', $options); 

        return new Cache($adapter);



Parameters now behave the same way as MVC controllers. Whilst previously they all existed in the $params property, you can now name them appropriately:

use Phalcon\Cli\Task;

class MainTask extends Task
    public function testAction(string $yourName, string $myName)
        echo sprintf(
            'Hello %s!' . PHP_EOL,

        echo sprintf(
            'Best regards, %s' . PHP_EOL,


  • Removed Phalcon\Cli\Console::addModules in favor of Phalcon\Cli\Console::registerModules


  • Added delimiter, getDelimiter


  • Added getTaskSuffix(), setTaskSuffix()


  • Added setOptions, getOptions


  • Added Phalcon\Container, a proxy container class to the Phalcon\DI implementing PSR-11


  • Removed Phalcon\Debug::getMajorVersion


  • Added global setting orm.case_insensitive_column_map to attempt to find value in the column map case-insensitively. Can be also enabled by setting caseInsensitiveColumnMap key in \Phalcon\Mvc\Model::setup()
  • Removed Phalcon\Db namespace. Replaced by Phalcon\Db\AbstractDb for necessary methods and Phalcon\Db\Enum for constants, i.e.:
use Phalcon\Db\Enum;

echo Enum::FETCH_ASSOC;


  • Added fetchColumn, insertAsDict, updateAsDict


  • Added more column types for the Mysql adapter. The adapters support
    • TYPE_BIT
    • TYPE_VARCHAR Some adapters do not support certain types. For instance JSON is not supported for Sqlite. It will be automatically changed to VARCHAR.


  • Added registerCustomFunction, getCustomFunctions, getSqlExpression


  • Changed addPrimaryKey to make primary key constraints names unique by prefixing them with the table name.



  • Added getParameter, isResolved


  • Changed Phalcon\Di\Service constructor to no longer takes the name of the service.


  • Removed Phalcon\Dispatcher::setModelBinding() in favor of Phalcon\Dispatcher::setModelBinder()
  • Added getHandlerSuffix(), setHandlerSuffix()



  • Added hasListeners


  • Added ability to set a custom template for the Flash Messenger.
  • Constructor no longer accepts an array for the CSS classes. You will need to use setCssClasses() to set your custom CSS classes for the component
  • The constructor now accepts an optional Phalcon\Escaper object, as well as a Phalcon\Session\Manager object (in the case of Phalcon\Flash\Session), in case you do not wish to use the DI and set it yourself.


The Filter component has been rewritten, utilizing a service locator. Each sanitizer is now enclosed on its own class and lazy loaded to provide maximum performance and the lowest resource usage as possible.


The Phalcon\Filter class has been rewritten to act as a service locator for different sanitizers. This object allows you to sanitize input as before using the sanitize() method.

The values sanitized are automatically cast to the relevant types. This is the default behavior for the int, bool and float filters.

When instantiating the filter object, it does not know about any sanitizers. You have two options:

Load All the Default Sanitizers

You can load all the Phalcon supplied sanitizers by utilizing the Phalcon\Filter\FilterFactory component.


use Phalcon\Filter\FilterFactory;

$factory = new FilterFactory();
$locator = $factory->newInstance();
CallingnewInstance() will return a Phalcon\Filter object with all the sanitizers registered. The sanitizers are lazy loaded so they are instantiated only when called from the locator.

Load Only Sanitizers You Want

You can instantiate the Phalcon\Filter component and either use the set() method to set all the sanitizers you need, or pass an array in the constructor with the sanitizers you want to register.

Using the FactoryDefault

If you use the Phalcon\Di\FactoryDefault container, then the Phalcon\Filter is automatically loaded in the container. You can then continue to use the service in your controllers or components as you did before. The name of the service in the Di is filter, just as before.

Also components that utilize the filter service, such as the Request object, transparently use the new filter locator. No additional changes required for those components.

Using a Custom Di

If you have set up all the services in the Phalcon\Di yourself and need the filter service, you will need to change its registration as follows:


use Phalcon\Di;
use Phalcon\Filter\FilterFactory;

$container = new Di();

    function () {
        $factory = new FilterFactory();
        return $factory->newInstance();


Note that even if you register the filter service manually, the name of the service must be filter so that other components can use it


The constants that the v3 Phalcon\Filter have somewhat changed.


  • FILTER_INT_CAST (int!)
  • FILTER_FLOAT_CAST (float!)

By default the service sanitizers cast the value to the appropriate type so these are obsolete

  • FILTER_APHANUM has been removed - replaced by FILTER_ALNUM


  • FILTER_SPECIAL_CHARS has changed been removed - replaced by FILTER_SPECIAL
  • FILTER_ALPHA - sanitize only alpha characters
  • FILTER_BOOL - sanitize boolean including "yes", "no", etc.
  • FILTER_LOWERFIRST - sanitze using lcfirst
  • FILTER_REGEX - sanitize based on a pattern (preg_replace)
  • FILTER_REMOVE - sanitize by removing characters (str_replace)
  • FILTER_REPLACE - sanitize by replacing characters (str_replace)
  • FILTER_SPECIALFULL - sanitize special chars (filter_var)
  • FILTER_UPPERFIRST - sanitize using ucfirst
  • FILTER_UPPERWORDS - sanitize using ucwords



  • Phalcon\Forms\Form::clear will no longer call Phalcon\Forms\Element::clear, instead it will clear/set default value itself, and Phalcon\Forms\Element::clear will now call Phalcon\Forms\Form::clear if it’s assigned to the form, otherwise it will just clear itself.
  • Phalcon\Forms\Form::getValue will now also try to get the value by calling Tag::getValue or element’s getDefault method before returning null, and Phalcon\Forms\Element::getValue calls Tag::getDefault only if it’s not added to the form.



  • Added Phalcon\Html\Breadcrumbs, a component that creates HTML code for breadcrumbs.


  • Added Phalcon\Html\Tag, a component that creates HTML elements. It will replace Phalcon\Tag in a future version. This component does not use static method calls.


  • Removed isSecureRequest in favor of isSecure
  • Removed isSoapRequested in favor of isSoap


  • Added hasHeader() method to Phalcon\Http\Response to provide the ability to check if a header exists.
  • Added Phalcon\Http\Response\Cookies::getCookies
  • Changed setHeaders now merges the headers with any pre-existing ones in the internal collection
  • Added two new events response::beforeSendHeaders and response::afterSendHeaders


  • Added Phalcon\Image\Enum
  • Renamed Phalcon\Image\Adapter to Phalcon\Image\Adapter\AbstractAdapter
  • Renamed Phalcon\Image\Factory to Phalcon\Image\ImageFactory
  • Removed Phalcon\Image

Image\Enum (Constants)



use Phalcon\Image\Enum;

// Resizing constraints
echo Enum::AUTO;    // prints 4
echo Enum::HEIGHT;  // prints  3
echo Enum::INVERSE; // prints  5
echo Enum::NONE;   // prints  1
echo Enum::PRECISE; // prints  6
echo Enum::TENSILE; // prints  7
echo Enum::WIDTH;   // prints  2

// Flipping directions
echo Enum::HORIZONTAL; // prints  11
echo Enum::VERTICAL;   // prints  12


The Logger component has been rewritten to comply with PSR-3. This allows you to use the Phalcon\Logger to any application that utilizes a PSR-3 logger, not just Phalcon based ones.

In v3, the logger was incorporating the adapter in the same component. So in essence when creating a logger object, the developer was creating an adapter (file, stream etc.) with logger functionality.

For v4, we rewrote the component to implement only the logging functionality and to accept one or more adapters that would be responsible for doing the work of logging. This immediately offers compatibility with PSR-3 and separates the responsibilities of the component. It also offers an easy way to attach more than one adapter to the logging component so that logging to multiple adapters can be achieved. By using this implementation we have reduced the code necessary for this component and removed the old Logger\Multiple component.

Creating a Logger Component


use Phalcon\Logger;
use Phalcon\Logger\Adapter\Stream;

$adapter = new Stream('/logs/application.log');
$logger  = new Logger(
        'main' => $adapter,

$logger->error('Something went wrong');

Registering it in the DI


use Phalcon\Di;
use Phalcon\Logger;
use Phalcon\Logger\Adapter\Stream;

$container = new Di();

    function () {
        $adapter = new Stream('/logs/application.log');
        $logger  = new Logger(
                'main' => $adapter,

        return $logger;

Multiple Loggers

The Phalcon\Logger\Multiple component has been removed. You can achieve the same functionality using the logger component and registering more than one adapter:


use Phalcon\Logger;
use Phalcon\Logger\Adapter\Stream;

$adapter1 = new Stream('/logs/first-log.log');
$adapter2 = new Stream('/remote/second-log.log');
$adapter3 = new Stream('/manager/third-log.log');

$logger = new Logger(
        'local'   => $adapter1,
        'remote'  => $adapter2,
        'manager' => $adapter3,

// Log to all adapters
$logger->error('Something went wrong');


  • Phalcon\Messages\Message and its collection Phalcon\Messages\Messages are new components that handle messages for models and validation. In the past we had two components, one for validation and one for models. We have merged these two, so you should be getting back a MessageInterface[] back when calling save on a model or when retrieving validation messages.
    • Changed Phalcon\Mvc\Model to use the Phalcon\Messages\Message object for its messages
    • Changed Phalcon\Validation\* to use the Phalcon\Messages\Message object for its messages


Removed in version 4.0:

  • Removed $logger->begin()
  • Removed $logger->commit()

Log Level

  • Removed $logger->setLogLevel()


  • You can no longer assign data to models while saving them


The getSource() method has been marked as final. As such you can no longer override this method in your model to set the corresponding table/source of the RDBMS. Instead, you can now use the initialize() method and setSource() to set the source of your model.


use Phalcon\Mvc\Model;

class Users
    public function initialize()
        // ....


The save() method no longer accepts parameters to set data. You can use assign instead.


The second parameter of Criteria::limit() ('offset') must now be an integer or null. Previously there was no type requirement.


$criteria->limit(10, 5);

$criteria->limit(10, null);



  • Removed Phalcon\Mvc\Collection::validationHasFailed
  • Removed calling Phalcon\Mvc\Collection::validate with object of type Phalcon\Mvc\Model\ValidatorInterface


  • Removed __call in favor of callMethod


  • Removed Phalcon\Model::reset
  • Added isRelationshipLoaded to check if relationship is loaded
  • Changed Phalcon\Model::assign parameters order to $data, $whiteList, $dataColumnMap
  • Changed Phalcon\Model::findFirst to return null instead of false if no record was found
  • Changed Phalcon\Model::getRelated() to return null for one to one relationships if no record was found


  • Removed addWhere
  • Removed order
  • Removed order in favor of orderBy


  • Added distinct, leftJoin, innerJoin, rightJoin, groupBy, having, cache, getColumns, getGroupBy, getHaving


  • Load no longer reuses already initialized models
  • Removed Phalcon\Model\Manager::registerNamespaceAlias()
  • Removed Phalcon\Model\Manager::getNamespaceAlias()
  • Removed Phalcon\Model\Manager::getNamespaceAliases()
  • The signature of Phalcon\Mvc\Model\Manager::getRelationRecords() has changed
  • The signature of Phalcon\Mvc\Model\Manager::getBelongsToRecords() has changed
  • The signature of Phalcon\Mvc\Model\Manager::getHasOneRecords() has changed
  • The signature of Phalcon\Mvc\Model\Manager::getHasManyRecords() has changed


  • Added isVisibleModelProperty, keepSnapshots, isKeepingSnapshots, useDynamicUpdate, isUsingDynamicUpdate, addHasManyToMany, existsHasManyToMany, getRelationRecords, getHasManyToMany
  • Removed Phalcon\Model\ManagerInterface::getNamespaceAlias()
  • Removed Phalcon\Model\ManagerInterface::registerNamespaceAlias()


  • Added setModel, getModel, setCode, getCode


  • Added getSingleResult, setBindParams, getBindParams, setBindTypes, setSharedLock, getBindTypes, getSql


  • Added offset


  • Added bind support. The Query Builder has the same methods as Phalcon\Mvc\Model\Query; getBindParams, setBindParams, getBindTypes and setBindTypes.
  • Changed addFrom to remove third parameter $with


  • Added distinct, getDistinct, forUpdate, offset, getOffset


  • Added getParams


  • Added setHydrateMode, getHydrateMode, getMessages, update, delete, filter


  • Added setDbService, getDbService, setRollbackPendent, getRollbackPendent


  • Removed Phalcon\Mvc\Model\Validator\* in favor of Phalcon\Validation\Validator\*


  • Added getModelsMetaData


  • Removed getRewriteUri(). The URI needs to be passed in the handle method of the application object.


  • Added attach


  • Added convert so that calling add will return an instance that has convert method


  • Added response handler to Phalcon\Mvc\Micro, Phalcon\Mvc\Micro::setResponseHandler, to allow use of a custom response handler.


  • Removed Phalcon\Mvc\User\Component - use Phalcon\Di\Injectable instead
  • Removed Phalcon\Mvc\User\Module - use Phalcon\Di\Injectable instead
  • Removed Phalcon\Mvc\User\Plugin - use Phalcon\Di\Injectable instead


The options for Volt have changed (the key names). Using the old syntax will produce a deprecation warning. The new options are:

  • always - Always compile
  • extension - Extension of files
  • separator - Separator (used for the folders/routes)
  • stat - Stat each file before trying to use it
  • path - The path of the files
  • prefix - The prefix of the files


  • getPaginate now becomes paginate
  • $before is removed and replaced with $previous
  • $total_pages is removed since it contained the same information as $last
  • Added Phalcon\Paginator\RepositoryInterface for repository the current state of paginator and also optional sets the aliases for properties repository


  • Removed getRewriteUri(). The URI needs to be passed in the handle method of the application object.
  • You can add CONNECT, PURGE, TRACE routes to the Router Group. They function the same as they do in the normal Router:
use Phalcon\Mvc\Router\Group;

$group = new Group();

        'controller' => 'api',
        'action'     => 'connect',

        'controller' => 'api',
        'action'     => 'purge',

        'controller' => 'api',
        'action'     => 'trace',


  • Removed hasLibreSsl
  • Removed getSslVersionNumber
  • Added setPadding
  • Added a retainer for the current token to be used during the checks, so when getToken is called the token used for checks does not change



  • Added numFiles returning long - the number of files present in the request
  • Changed hasFiles to return bool - if the request has files or not


  • Added numFiles returning int - the number of files present in the request
  • Changed hasFiles to return bool - if the request has files or not


Session and Session\Bag no longer get loaded by default in Phalcon\DI\FactoryDefault. Session was refactored.

  • Added Phalcon\Session\Adapter\AbstractAdapter
  • Added Phalcon\Session\Adapter\Noop
  • Added Phalcon\Session\Adapter\Stream
  • Added Phalcon\Session\Manager
  • Added Phalcon\Session\ManagerInterface
  • Removed Phalcon\Session\Adapter - replaced by Phalcon\Session\Adapter\AbstractAdapter
  • Removed Phalcon\Session\AdapterInterface - replaced by native SessionHandlerInterface
  • Removed Phalcon\Session\Adapter\Files - replaced by Phalcon\Session\Adapter\Stream
  • Removed Phalcon\Session\Adapter\Memcache
  • Removed Phalcon\Session\BagInterface
  • Removed Phalcon\Session\Factory


Each adapter implements PHP's SessionHandlerInterface. Available adapters are:

  • Phalcon\Session\Adapter\AbstractAdapter
  • Phalcon\Session\Adapter\Libmemcached
  • Phalcon\Session\Adapter\Noop
  • Phalcon\Session\Adapter\Redis
  • Phalcon\Session\Adapter\Stream


  • Now is the single component that offers session manipulation by using adapters (see above). Each adapter implements PHP's SessionHandlerInterface
  • Developers can add any adapter that implements SessionHandlerInterface


  • Added renderTitle() that renders the title enclosed in <title> tags.
  • Changed getTitle. It returns only the text. It accepts prepend, append booleans to prepend or append the relevant text to the title.
  • Changed textArea to use htmlspecialchars to prevent XSS injection.


The Phalcon\Text component has been removed in favor of the Phalcon\Helper\Str. The functionality offered by Phalcon\Text in v3 is replicated and enhanced in the new class: Phalcon\Helper\Str.



  • Removed Phalcon\Validation\Message and Phalcon\Mvc\Model\Message in favor of Phalcon\Messages\Message
  • Removed Phalcon\Validation\MessageInterface and Phalcon\Mvc\Model\MessageInterface in favor of Phalcon\Messages\MessageInterface
  • Removed Phalcon\Validation\Message\Group in favor of Phalcon\Messages\Messages
  • Validator messages have been moved inside each validator


  • Removed isSetOption


  • Added Phalcon\Validation\Validator\Ip, class used to validate ip address fields. It allows to validate a field selecting IPv4 or IPv6, allowing private or reserved ranges and empty values if necessary.


View caching along with the viewCache service have been removed from the framework because they were incompatible with the new Cache component. Developers can easily utilize a view cache from external services such as Varnish, Cloudflare etc. Additionally, developers can cache fragments by either using the Phalcon\Mvc\View\Simple::render() or the Phalcon\Mvc\View::toString(). Those two methods return the produced HTML that can be cached in the cache backend of your choice.


The Phalcon\Mvc\Url component has been renamed to Phalcon\Url. The functionality remains the same.

Cheat Sheet


3.4.x State 4.0.x
Phalcon\Acl Removed
Phalcon\Acl\Adapter Renamed to Phalcon\Acl\Adapter\AbstractAdapter
Phalcon\Acl\Resource Renamed to Phalcon\Acl\Component
New Phalcon\Acl\Enum


3.4.x State 4.0.x
Phalcon\Annotations\Adapter Renamed to Phalcon\Annotations\Adapter\AbstractAdapter
Phalcon\Annotations\Adapter\Apc Removed
Phalcon\Annotations\Adapter\Files Renamed to Phalcon\Annotations\Adapter\Stream
Phalcon\Annotations\Adapter\Xcache Removed
Phalcon\Annotations\Factory Renamed to Phalcon\Annotations\AnnotationsFactory


3.4.x State 4.0.x
Phalcon\Application Renamed to Phalcon\Application\AbstractApplication


3.4.x State 4.0.x
Phalcon\Assets\Resource Renamed to Phalcon\Assets\Asset
Phalcon\Assets\Resource\Css Renamed to Phalcon\Assets\Asset\Css
Phalcon\Assets\Resource\Js Renamed to Phalcon\Assets\Asset\Js


3.4.x State 4.0.x
Phalcon\Cache\Backend\Apc Removed
Phalcon\Cache\Backend Renamed to Phalcon\Cache
Phalcon\Cache\Backend\Factory Renamed to Phalcon\Cache\AdapterFactory
Phalcon\Cache\Backend\Apcu Renamed to Phalcon\Cache\Adapter\Apcu
Phalcon\Cache\Backend\File Renamed to Phalcon\Cache\Adapter\Stream
Phalcon\Cache\Backend\Libmemcached Renamed to Phalcon\Cache\Adapter\Libmemcached
Phalcon\Cache\Backend\Memcache Removed
Phalcon\Cache\Backend\Memory Renamed to Phalcon\Cache\Adapter\Memory
Phalcon\Cache\Backend\Mongo Removed
Phalcon\Cache\Backend\Redis Renamed to Phalcon\Cache\Adapter\Redis
New Phalcon\Cache\CacheFactory
Phalcon\Cache\Backend\Xcache Removed
Phalcon\Cache\Exception Renamed to Phalcon\Cache\Exception\Exception
New Phalcon\Cache\Exception\InvalidArgumentException
Phalcon\Cache\Frontend\Base64 Removed
Phalcon\Cache\Frontend\Data Removed
Phalcon\Cache\Frontend\Factory Removed
Phalcon\Cache\Frontend\Igbinary Removed
Phalcon\Cache\Frontend\Json Removed
Phalcon\Cache\Frontend\Msgpack Removed
Phalcon\Cache\Frontend\None Removed
Phalcon\Cache\Frontend\Output Removed
Phalcon\Cache\Multiple Removed


3.4.x State 4.0.x
New Phalcon\Collection
New Phalcon\Collection\Exception
New Phalcon\Collection\ReadOnly


3.4.x State 4.0.x
Phalcon\Config\Factory Renamed to Phalcon\Config\ConfigFactory


3.4.x State 4.0.x
New Phalcon\Container


3.4.x State 4.0.x
Phalcon\Db Renamed to Phalcon\Db\AbstractDb
Phalcon\Db\Adapter Renamed to Phalcon\Db\Adapter\AbstractAdapter
Phalcon\Db\Adapter\Pdo Renamed to Phalcon\Db\Adapter\Pdo\AbstractPdo
Phalcon\Db\Adapter\Pdo\Factory Renamed to Phalcon\Db\Adapter\PdoFactory
New Phalcon\Db\Enum


3.4.x State 4.0.x
Phalcon\Dispatcher Renamed to Phalcon\Dispatcher\AbstractDispatcher
New Phalcon\Dispatcher\Exception


3.4.x State 4.0.x
New Phalcon\Di\AbstractInjectionAware
New Phalcon\Di\Exception\ServiceResolutionException


3.4.x State 4.0.x
New Phalcon\Domain\Payload\Payload
New Phalcon\Domain\Payload\PayloadFactory
New Phalcon\Domain\Payload\Status


3.4.x State 4.0.x
Phalcon\Factory Renamed to Phalcon\Factory\AbstractFactory


3.4.x State 4.0.x
New Phalcon\Filter\FilterFactory
New Phalcon\Filter\Sanitize\AbsInt
New Phalcon\Filter\Sanitize\Alnum
New Phalcon\Filter\Sanitize\Alpha
New Phalcon\Filter\Sanitize\BoolVal
New Phalcon\Filter\Sanitize\Email
New Phalcon\Filter\Sanitize\FloatVal
New Phalcon\Filter\Sanitize\IntVal
New Phalcon\Filter\Sanitize\Lower
New Phalcon\Filter\Sanitize\LowerFirst
New Phalcon\Filter\Sanitize\Regex
New Phalcon\Filter\Sanitize\Remove
New Phalcon\Filter\Sanitize\Replace
New Phalcon\Filter\Sanitize\Special
New Phalcon\Filter\Sanitize\SpecialFull
New Phalcon\Filter\Sanitize\StringVal
New Phalcon\Filter\Sanitize\Striptags
New Phalcon\Filter\Sanitize\Trim
New Phalcon\Filter\Sanitize\Upper
New Phalcon\Filter\Sanitize\UpperFirst
New Phalcon\Filter\Sanitize\UpperWords
New Phalcon\Filter\Sanitize\Url


3.4.x State 4.0.x
Phalcon\Flash Renamed to Phalcon\Flash\AbstractFlash


3.4.x State 4.0.x
Phalcon\Forms\Element Renamed to Phalcon\Forms\Element\AbstractElement


3.4.x State 4.0.x
New Phalcon\Helper\Arr
New Phalcon\Helper\Exception
New Phalcon\Helper\Fs
New Phalcon\Helper\Json
New Phalcon\Helper\Number
New Phalcon\Helper\Str


3.4.x State 4.0.x
New Phalcon\Html\Attributes
New Phalcon\Html\Breadcrumbs
New Phalcon\Html\Exception
New Phalcon\Html\Helper\AbstractHelper
New Phalcon\Html\Helper\Anchor
New Phalcon\Html\Helper\AnchorRaw
New Phalcon\Html\Helper\Body
New Phalcon\Html\Helper\Button
New Phalcon\Html\Helper\Close
New Phalcon\Html\Helper\Element
New Phalcon\Html\Helper\ElementRaw
New Phalcon\Html\Helper\Form
New Phalcon\Html\Helper\Img
New Phalcon\Html\Helper\Label
New Phalcon\Html\Helper\TextArea
New Phalcon\Html\Link\EvolvableLink
New Phalcon\Html\Link\EvolvableLinkProvider
New Phalcon\Html\Link\Link
New Phalcon\Html\Link\LinkProvider
New Phalcon\Html\Link\Serializer\Header
New Phalcon\Html\TagFactory


3.4.x State 4.0.x
New Phalcon\Http\Message\AbstractCommon
New Phalcon\Http\Message\AbstractMessage
New Phalcon\Http\Message\AbstractRequest
New Phalcon\Http\Message\Exception\InvalidArgumentException
New Phalcon\Http\Message\Request
New Phalcon\Http\Message\RequestFactory
New Phalcon\Http\Message\Response
New Phalcon\Http\Message\ResponseFactory
New Phalcon\Http\Message\ServerRequest
New Phalcon\Http\Message\ServerRequestFactory
New Phalcon\Http\Message\Stream
New Phalcon\Http\Message\StreamFactory
New Phalcon\Http\Message\Stream\Input
New Phalcon\Http\Message\Stream\Memory
New Phalcon\Http\Message\Stream\Temp
New Phalcon\Http\Message\UploadedFile
New Phalcon\Http\Message\UploadedFileFactory
New Phalcon\Http\Message\Uri
New Phalcon\Http\Message\UriFactory
New Phalcon\Http\Server\AbstractMiddleware
New Phalcon\Http\Server\AbstractRequestHandler


3.4.x State 4.0.x
Phalcon\Image Removed
Phalcon\Image\Adapter Renamed to Phalcon\Image\Adapter\AbstractAdapter
New Phalcon\Image\Enum
Phalcon\Image\Factory Renamed to Phalcon\Image\ImageFactory


3.4.x State 4.0.x
New Phalcon\Logger\AdapterFactory
Phalcon\Logger\Adapter Renamed to Phalcon\Logger\Adapter\AbstractAdapter
Phalcon\Logger\Adapter\Blackhole Renamed to Phalcon\Logger\Adapter\Noop
Phalcon\Logger\Adapter\File Renamed to Phalcon\Logger\Adapter\Stream
Phalcon\Logger\Adapter\Firephp Removed
Phalcon\Logger\Factory Renamed to Phalcon\Logger\LoggerFactory
Phalcon\Logger\Formatter Renamed to Phalcon\Logger\Formatter\AbstractFormatter
Phalcon\Logger\Formatter\Firephp Removed
Phalcon\Logger\Formatter\Syslog Removed
Phalcon\Logger\Multiple Removed

Message (new in V4, Formerly Phalcon\Validation\Message in 3.4)

3.4.x State 4.0.x
New Phalcon\Messages\Exception
New Phalcon\Messages\Message
New Phalcon\Messages\Messages


3.4.x State 4.0.x
Phalcon\Mvc\Collection Renamed to Phalcon\Collection
Phalcon\Mvc\Collection\Behavior Removed
Phalcon\Mvc\Collection\Behavior\SoftDelete Removed
Phalcon\Mvc\Collection\Behavior\Timestampable Removed
Phalcon\Mvc\Collection\Document Removed
Phalcon\Mvc\Collection\Exception Renamed to Phalcon\Collection\Exception
Phalcon\Mvc\Collection\Manager Removed
New Phalcon\Collection\ReadOnly
Phalcon\Mvc\Model\Message Renamed to Phalcon\Messages\Message
Phalcon\Mvc\Model\MetaData\Apc Removed
Phalcon\Mvc\Model\MetaData\Files Renamed to Phalcon\Mvc\Model\MetaData\Stream
Phalcon\Mvc\Model\MetaData\Memcache Removed
Phalcon\Mvc\Model\MetaData\Session Removed
Phalcon\Mvc\Model\MetaData\Xcache Removed
Phalcon\Mvc\Model\Validator Renamed to Phalcon\Validation\Validator
Phalcon\Mvc\Model\Validator\Email Renamed to Phalcon\Validation\Validator\Email
Phalcon\Mvc\Model\Validator\Exclusionin Renamed to Phalcon\Validation\Validator\ExclusionIn
Phalcon\Mvc\Model\Validator\Inclusionin Renamed to Phalcon\Validation\Validator\InclusionIn
Phalcon\Mvc\Model\Validator\Ip Renamed to Phalcon\Validation\Validator\Ip
Phalcon\Mvc\Model\Validator\Numericality Renamed to Phalcon\Validation\Validator\Numericality
Phalcon\Mvc\Model\Validator\PresenceOf Renamed to Phalcon\Validation\Validator\PresenceOf
Phalcon\Mvc\Model\Validator\Regex Renamed to Phalcon\Validation\Validator\Regex
Phalcon\Mvc\Model\Validator\StringLength Renamed to Phalcon\Validation\Validator\StringLength
Phalcon\Mvc\Model\Validator\Uniqueness Renamed to Phalcon\Validation\Validator\Uniqueness
Phalcon\Mvc\Model\Validator\Url Renamed to Phalcon\Validation\Validator\Url
Phalcon\Mvc\Url Renamed to Phalcon\Url
Phalcon\Mvc\Url\Exception Renamed to Phalcon\Url\Exception
Phalcon\Mvc\User\Component Renamed to Phalcon\Di\Injectable
Phalcon\Mvc\User\Module Renamed to Phalcon\Di\Injectable
Phalcon\Mvc\User\Plugin Renamed to Phalcon\Di\Injectable
Phalcon\Mvc\View\Engine Renamed to Phalcon\Mvc\View\Engine\AbstractEngine


3.4.x State 4.0.x
Phalcon\Paginator\Adapter Renamed to Phalcon\Paginator\Adapter\AbstractAdapter
Phalcon\Paginator\Factory Renamed to Phalcon\Paginator\PaginatorFactory
New Phalcon\Paginator\Repository


3.4.x State 4.0.x
Phalcon\Queue\Beanstalk Removed
Phalcon\Queue\Beanstalk\Exception Removed
Phalcon\Queue\Beanstalk\Job Removed


3.4.x State 4.0.x
Phalcon\Session\Adapter Renamed to Phalcon\Session\Adapter\AbstractAdapter
Phalcon\Session\Adapter\Files Renamed to Phalcon\Session\Adapter\Stream
New Phalcon\Session\Adapter\Noop
Phalcon\Session\Adapter\Memcache Removed
Phalcon\Session\Factory Renamed to Phalcon\Session\Manager


3.4.x State 4.0.x
New Phalcon\Storage\AdapterFactory
New Phalcon\Storage\Adapter\AbstractAdapter
New Phalcon\Storage\Adapter\Apcu
New Phalcon\Storage\Adapter\Libmemcached
New Phalcon\Storage\Adapter\Memory
New Phalcon\Storage\Adapter\Redis
New Phalcon\Storage\Adapter\Stream
New Phalcon\Storage\Exception
New Phalcon\Storage\SerializerFactory
New Phalcon\Storage\Serializer\AbstractSerializer
New Phalcon\Storage\Serializer\Base64
New Phalcon\Storage\Serializer\Igbinary
New Phalcon\Storage\Serializer\Json
New Phalcon\Storage\Serializer\Msgpack
New Phalcon\Storage\Serializer\None
New Phalcon\Storage\Serializer\Php


3.4.x State 4.0.x
Phalcon\Translate Removed
Phalcon\Translate\Adapter Renamed to Phalcon\Translate\Adapter\AbstractAdapter
New Phalcon\Translate\InterpolatorFactory
Phalcon\Translate\Factory Renamed to Phalcon\Translate\TranslateFactory


3.4.x State 4.0.x
New Phalcon\Url
New Phalcon\Url\Exception


3.4.x State 4.0.x
Phalcon\Validation\CombinedFieldsValidator Renamed to Phalcon\Validation\AbstractCombinedFieldsValidator
Phalcon\Validation\Message Renamed to Phalcon\Messages\Message
Phalcon\Validation\Message\Group Renamed to Phalcon\Messages\Messages
Phalcon\Validation\Validator Renamed to Phalcon\Validation\AbstractValidator
New Phalcon\Validation\AbstractValidatorComposite
New Phalcon\Validation\Exception
New Phalcon\Validation\ValidatorFactory
New Phalcon\Validation\Validator\File\AbstractFile
New Phalcon\Validation\Validator\File\MimeType
New Phalcon\Validation\Validator\File\Resolution\Equal
New Phalcon\Validation\Validator\File\Resolution\Max
New Phalcon\Validation\Validator\File\Resolution\Min
New Phalcon\Validation\Validator\File\Size\Equal
New Phalcon\Validation\Validator\File\Size\Max
New Phalcon\Validation\Validator\File\Size\Min
New Phalcon\Validation\Validator\StringLength\Max
New Phalcon\Validation\Validator\StringLength\Min