Symfony2 Twig Extensions

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Symfony2 Twig Extensions

Twig is the default template engine for Symfony2. By itself, it already contains a lot of build-in functions, filters and tags (http://twig.sensiolabs.org/documentation then scroll to the bottom).

Symfony2 adds more custom extension on top of Twig to integrate some components into the Twig templates. Below is information about all the custom functions, filters and tags that are added when using the Symfony2 Core Framework.

There may also be tags in bundles you use that aren't listed here.

Functions

Function Syntax Usage
asset(path, packageName = null) Get the public path of the asset, more information in "Linking to Assets".
asset_version(packageName = null) Get the current version of the package, more information in "Linking to Assets".
form_enctype(view) This will render the required enctype="multipart/form-data" attribute if the form contains at least one file upload field, more information in in the Twig Form reference.
form_widget(view, variables = {}) This will render a complete form or a specific HTML widget of a field, more information in the Twig Form reference.
form_errors(view) This will render any errors for the given field or the "global" errors, more information in the Twig Form reference.
form_label(view, label = null, variables = {}) This will render the label for the given field, more information in the Twig Form reference.
form_row(view, variables = {}) This will render the row (the field's label, errors and widget) of the given field, more information in the Twig Form reference.
form_rest(view, variables = {}) This will render all fields that have not yet been rendered, more information in the Twig Form reference.
_form_is_choice_group(label) This will return true if the label is a choice group.
_form_is_choice_selected(view, choice) This will return true if the given choice is selected.
is_granted(role, object = null, field = null) This will return true if the current user has the required role, more information in "Access Control in Templates"
path(name, parameters = {}) Get a relative url for the given route, more information in "Linking to Pages".
url(name, parameters = {}) Equal to path(...) but it generates an absolute url

Filters

Filter Syntax Usage
text|trans(arguments = {}, domain = 'messages', locale = null) This will translate the text into the current language, more information in Twig Templates.
text|transchoice(count, arguments = {}, domain = 'messages', locale = null) This will translate the text with pluralization, more information in Twig Templates.
variable|yaml_encode(inline = 0) This will transform the variable text into a YAML syntax.
variable|yaml_dump This will render a yaml syntax with their type.
classname|abbr_class This will render an abbr element with the short name of a PHP class.
methodname|abbr_method This will render a PHP method inside a abbr element (e.g. Symfony\Component\HttpFoundation\Response::getContent
arguments|format_args This will render a string with the arguments of a function and their types.
arguments|format_args_as_text Equal to [...]|format_args, but it strips the tags.
path|file_excerpt(line) This will render an excerpt of a code file around the given line.
path|format_file(line, text = null) This will render a file path in a link.
exceptionMessage|format_file_from_text Equal to format_file except it parsed the default PHP error string into a file path (i.e. 'in foo.php on line 45')
path|file_link(line) This will render a path to the correct file (and line number)

Tags

Tag Syntax Usage
{% render url('route', {parameters}) %} This will render the Response Content for the given controller that the URL points to. For more information, see Embedding Controllers.
{% form_theme form 'file' %} This will look inside the given file for overridden form blocks, more information in How to customize Form Rendering.
{% trans with {variables} %}...{% endtrans %} This will translate and render the text, more information in Twig Templates
{% transchoice count with {variables} %} ... {% endtranschoice %} This will translate and render the text with pluralization, more information in Twig Templates

Global Variables

Variable Usage
app Attributes: app.user, app.request app.session, app.environment, app.debug app.security The app variable is available everywhere, and gives you quick access to many commonly needed objects. The app variable is instance of GlobalVariables

Symfony Standard Edition Extensions

The Symfony Standard Edition adds some bundles to the Symfony2 Core Framework. Those bundles can have other Twig extensions:

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