---
date: 2020-11-12
id: 12ab3998-b4f3-4754-ab3c-a5d3ebe3c8ce
title: Symfony 4.3
---

# What's new

## Components

### Console

-   [Console Hyperlinks](20201112120358-symfony_console_hyperlinks)
-   [iterate() method](20201112130435-iterate_method)

### Mailer

-   [Mailer Component](20201112135249-mailer_component)

### Mime

-   [Mime Component](20201112140650-mime_component)

## Configuration

-   [Automatic Search Engine
    Protection](20201112124832-automatic_search_engine_protection)

## Routing

-   [Always Include Route Default
    Values](20201112121416-always_include_route_default_values)
-   [UTF8 Routing Option](20201112132747-utf8_routing_option)

## Constraints

### Bic constraint

-   [Validate BIC and IBAN Codes
    Together](20201112123244-validate_bic_and_iban_codes_together)

### CardScheme constraint

-   [CardScheme Constraint](20201112123704-cardscheme_constraint)

### Compromised password constraint

-   [Compromised Password
    Constraint](20201112134752-compromised_password_constraint)

### HttpClient Component

-   [HttpClient Component](20201112140448-httpclient_component)

### JSON constraint

-   [JSON Constraint](20201112125637-symfony_json_constraint)

### NotBlank constraint

-   [NotBlank allowNull](20201112130816-notblank_allownull)

### Unique constraint

-   [Unique Constraint](20201112132331-unique_constraint)

### Timeone constraint

-   [Timezone Constraint](20201112134545-timezone_constraint)

### Number constraints

-   [Number Constraints](20201112140917-number_constraints)

## Services

-   [Deprecating Service
    Aliases](20201112124159-deprecating_service_aliases)
-   [Configuring Services With Immutable
    Setters](20201112131310-configuring_services_with_immutable_setters)

## Sessions

-   [Configurable Session ID](20201112125413-configurable_session_id)

## Validation

-   [Automatic Validation Based on Doctrine
    Mapping](20201112132007-automatic_validation_based_on_doctrine_mapping)

## Password hashers

-   Deprecated [Argon2i Password
    Hasher](20201110152730-symfony_argon2i_password_hasher)
-   [Sodium password encoder](20201112133736-sodium_password_encoder)
-   [Symfony Native Encoder](20201112135851-symfony_native_encoder)