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Symfony Twig Extensions

Symfony Twig Extensions

Twig is the default template engine for Symfony. By itself, it already contains a lot of built-in functions, filters, tags and tests. You can learn more about them from the Twig Reference.

The Symfony framework adds quite a few extra functions, filters, tags and tests to seamlessly integrate the various Symfony components with Twig templates. The following sections describe these extra features.

Tip

Technically, most of the extensions live in the Twig Bridge. That code might give you some ideas when you need to write your own Twig extension as described in How to Write a custom Twig Extension.

Note

This reference only covers the Twig extensions provided by the Symfony framework. You are probably using some other bundles as well, and those might come with their own extensions not covered here.

Tip

The Twig Extensions repository contains some additional Twig extensions that do not belong to the Twig core, so you might want to have a look at the Twig Extensions documentation.

Functions

render

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{{ render(uri, options = []) }}
uri
type: string | ControllerReference
options (optional)
type: array default: []

Renders the fragment for the given controller (using the controller function) or URI. For more information, see How to Embed Controllers in a Template.

The render strategy can be specified in the strategy key of the options.

Tip

The URI can be generated by other functions, like path and url.

render_esi

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{{ render_esi(uri, options = []) }}
uri
type: string | ControllerReference
options (optional)
type: array default: []

Generates an ESI tag when possible or falls back to the behavior of render function instead. For more information, see How to Embed Controllers in a Template.

Tip

The URI can be generated by other functions, like path and url.

Tip

The render_esi() function is an example of the shortcut functions of render. It automatically sets the strategy based on what's given in the function name, e.g. render_hinclude() will use the hinclude.js strategy. This works for all render_*() functions.

controller

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{{ controller(controller, attributes = [], query = []) }}
controller
type: string
attributes (optional)
type: array default: []
query (optional)
type: array default: []

Returns an instance of ControllerReference to be used with functions like render() and render_esi().

asset

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{{ asset(path, packageName = null) }}
path
type: string
packageName (optional)
type: string | null default: null

Returns a public path to path, which takes into account the base path set for the package and the URL path. More information in Linking to Assets. Symfony provides various cache busting implementations via the version, version_strategy, and json_manifest_path configuration options.

asset_version

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{{ asset_version(packageName = null) }}
packageName (optional)
type: string | null default: null

Returns the current version of the package, more information in Linking to Assets.

form

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{{ form(view, variables = []) }}
view
type: FormView
variables (optional)
type: array default: []

Renders the HTML of a complete form, more information in the Twig Form reference.

form_start

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{{ form_start(view, variables = []) }}
view
type: FormView
variables (optional)
type: array default: []

Renders the HTML start tag of a form, more information in the Twig Form reference.

form_end

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{{ form_end(view, variables = []) }}
view
type: FormView
variables (optional)
type: array default: []

Renders the HTML end tag of a form together with all fields that have not been rendered yet, more information in the Twig Form reference.

form_widget

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{{ form_widget(view, variables = []) }}
view
type: FormView
variables (optional)
type: array default: []

Renders a complete form or a specific HTML widget of a field, more information in the Twig Form reference.

form_errors

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{{ form_errors(view) }}
view
type: FormView

Renders any errors for the given field or the global errors, more information in the Twig Form reference.

form_label

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{{ form_label(view, label = null, variables = []) }}
view
type: FormView
label (optional)
type: string default: null
variables (optional)
type: array default: []

Renders the label for the given field, more information in the Twig Form reference.

form_row

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{{ form_row(view, variables = []) }}
view
type: FormView
variables (optional)
type: array default: []

Renders the row (the field's label, errors and widget) of the given field, more information in the Twig Form reference.

form_rest

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{{ form_rest(view, variables = []) }}
view
type: FormView
variables (optional)
type: array default: []

Renders all fields that have not yet been rendered, more information in the Twig Form reference.

csrf_token

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{{ csrf_token(intention) }}
intention
type: string

Renders a CSRF token. Use this function if you want CSRF protection without creating a form.

is_granted

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{{ is_granted(role, object = null, field = null) }}
role
type: string
object (optional)
type: object
field (optional)
type: string

Returns true if the current user has the required role. Optionally, an object can be pasted to be used by the voter. More information can be found in Access Control in Templates.

logout_path

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{{ logout_path(key = null) }}
key (optional)
type: string

Generates a relative logout URL for the given firewall. If no key is provided, the URL is generated for the current firewall the user is logged into.

logout_url

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{{ logout_url(key = null) }}
key (optional)
type: string

Equal to the logout_path function, but it'll generate an absolute URL instead of a relative one.

path

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{{ path(name, parameters = [], relative = false) }}
name
type: string
parameters (optional)
type: array default: []
relative (optional)
type: boolean default: false

Returns the relative URL (without the scheme and host) for the given route. If relative is enabled, it'll create a path relative to the current path. More information in Linking to Pages.

Read Routing to learn more about the Routing component.

url

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{{ url(name, parameters = [], schemeRelative = false) }}
name
type: string
parameters (optional)
type: array default: []
schemeRelative (optional)
type: boolean default: false

Returns the absolute URL (with scheme and host) for the given route. If schemeRelative is enabled, it'll create a scheme-relative URL. More information in Linking to Pages.

Read Routing to learn more about the Routing component.

absolute_url

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{{ absolute_url(path) }}
path
type: string

Returns the absolute URL from the passed relative path. For example, assume you're on the following page in your app: http://example.com/products/hover-board.

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{{ absolute_url('/human.txt') }}
{# http://example.com/human.txt #}

{{ absolute_url('products_icon.png') }}
{# http://example.com/products/products_icon.png #}

relative_path

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{{ relative_path(path) }}
path
type: string

Returns the relative path from the passed absolute URL. For example, assume you're on the following page in your app: http://example.com/products/hover-board.

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{{ relative_path('http://example.com/human.txt') }}
{# ../human.txt #}

{{ relative_path('http://example.com/products/products_icon.png') }}
{# products_icon.png #}

expression

Creates an Expression in Twig. See "Template Expressions".

Filters

humanize

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{{ text|humanize }}
text
type: string

Makes a technical name human readable (i.e. replaces underscores by spaces or transforms camelCase text like helloWorld to hello world and then capitalizes the string).

trans

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{{ message|trans(arguments = [], domain = null, locale = null) }}
message
type: string
arguments (optional)
type: array default: []
domain (optional)
type: string default: null
locale (optional)
type: string default: null

Translates the text into the current language. More information in Translation Filters.

transchoice

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{{ message|transchoice(count, arguments = [], domain = null, locale = null) }}
message
type: string
count
type: integer
arguments (optional)
type: array default: []
domain (optional)
type: string default: null
locale (optional)
type: string default: null

Translates the text with pluralization support. More information in Translation Filters.

yaml_encode

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{{ input|yaml_encode(inline = 0, dumpObjects = false) }}
input
type: mixed
inline (optional)
type: integer default: 0
dumpObjects (optional)
type: boolean default: false

Transforms the input into YAML syntax. See Writing YAML Files for more information.

yaml_dump

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{{ value|yaml_dump(inline = 0, dumpObjects = false) }}
value
type: mixed
inline (optional)
type: integer default: 0
dumpObjects (optional)
type: boolean default: false

Does the same as yaml_encode(), but includes the type in the output.

abbr_class

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{{ class|abbr_class }}
class
type: string

Generates an <abbr> element with the short name of a PHP class (the FQCN will be shown in a tooltip when a user hovers over the element).

abbr_method

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{{ method|abbr_method }}
method
type: string

Generates an <abbr> element using the FQCN::method() syntax. If method is Closure, Closure will be used instead and if method doesn't have a class name, it's shown as a function (method()).

format_args

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{{ args|format_args }}
args
type: array

Generates a string with the arguments and their types (within <em> elements).

format_args_as_text

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{{ args|format_args_as_text }}
args
type: array

Equal to the format_args filter, but without using HTML tags.

file_excerpt

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{{ file|file_excerpt(line, srcContext = 3) }}
file
type: string
line
type: integer
srcContext (optional)
type: integer

Generates an excerpt of a code file around the given line number. The srcContext argument defines the total number of lines to display around the given line number (use -1 to display the whole file).

format_file

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{{ file|format_file(line, text = null) }}
file
type: string
line
type: integer
text (optional)
type: string default: null

Generates the file path inside an <a> element. If the path is inside the kernel root directory, the kernel root directory path is replaced by kernel.root_dir (showing the full path in a tooltip on hover).

format_file_from_text

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{{ text|format_file_from_text }}
text
type: string

Uses format_file to improve the output of default PHP errors.

Tags

form_theme

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{% form_theme form resources %}
form
type: FormView
resources
type: array | string

Sets the resources to override the form theme for the given form view instance. You can use _self as resources to set it to the current resource. More information in How to Customize Form Rendering.

trans

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{% trans with vars from domain into locale %}{% endtrans %}
vars (optional)
type: array default: []
domain (optional)
type: string default: string
locale (optional)
type: string default: string

Renders the translation of the content. More information in Twig Templates.

transchoice

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{% transchoice count with vars from domain into locale %}{% endtranschoice %}
count
type: integer
vars (optional)
type: array default: []
domain (optional)
type: string default: null
locale (optional)
type: string default: null

Renders the translation of the content with pluralization support, more information in Twig Templates.

trans_default_domain

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{% trans_default_domain domain %}
domain
type: string

This will set the default domain in the current template.

stopwatch

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{% stopwatch 'name' %}...{% endstopwatch %}

This will time the run time of the code inside it and put that on the timeline of the WebProfilerBundle.

Tests

selectedchoice

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{% if choice is selectedchoice(selectedValue) %}
choice
type: ChoiceView
selectedValue
type: string

Checks if selectedValue was checked for the provided choice field. Using this test is the most effective way.

Global Variables

app

The app variable is available everywhere and gives access to many commonly needed objects and values. It is an instance of GlobalVariables.

The available attributes are:

  • app.user, a PHP object representing the current user;
  • app.request, a :class:Symfony\\Component\\HttpFoundation\\Request object;
  • app.session, a :class:Symfony\\Component\\HttpFoundation\\Session\\Session object;
  • app.environment, a string with the name of the execution environment;
  • app.debug, a boolean telling whether the debug mode is enabled in the app;
  • app.token, a TokenInterface object representing the security token
  • app.flashes, returns flash messages from the session

This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.