Twig Configuration Reference (TwigBundle)

The TwigBundle integrates the Twig library in Symfony applications to render templates. All these options are configured under the twig key in your application configuration.

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        # displays the default config values defined by Symfony
$ php bin/console config:dump-reference twig

# displays the actual config values used by your application
$ php bin/console debug:config twig
    

Note

When using XML, you must use the http://symfony.com/schema/dic/twig namespace and the related XSD schema is available at: https://symfony.com/schema/dic/twig/twig-1.0.xsd

Configuration

auto_reload

type: boolean default: %kernel.debug%

If true, whenever a template is rendered, Symfony checks first if its source code has changed since it was compiled. If it has changed, the template is compiled again automatically.

The escaping strategy applied by default to the template (to prevent XSS attacks) is determined during compilation time based on the filename of the template. This means for example that the contents of a *.html.twig template are escaped for HTML and the contents of *.js.twig are escaped for JavaScript.

This option allows to define the Symfony service which will be used to determine the default escaping applied to the template.

autoescape_service_method

type: string default: null

If autoescape_service option is defined, then this option defines the method called to determine the default escaping applied to the template.

If the service defined in autoescape_service is invocable (i.e. it defines the `__invoke() PHP magic method`_) you can omit this option.

base_template_class

type: string default: Twig\Template

7.1

The base_template_class option is deprecated since Symfony 7.1.

Twig templates are compiled into PHP classes before using them to render contents. This option defines the base class from which all the template classes extend. Using a custom base template is discouraged because it will make your application harder to maintain.

cache

type: string | false default: %kernel.cache_dir%/twig

Before using the Twig templates to render some contents, they are compiled into regular PHP code. Compilation is a costly process, so the result is cached in the directory defined by this configuration option.

Set this option to false to disable Twig template compilation. However, this is not recommended; not even in the dev environment, because the auto_reload option ensures that cached templates which have changed get compiled again.

charset

type: string default: %kernel.charset%

The charset used by the template files. By default it's the same as the value of the kernel.charset container parameter, which is UTF-8 by default in Symfony applications.

date

These options define the default values used by the date filter to format date and time values. They are useful to avoid passing the same arguments on every date filter call.

format

type: string default: F j, Y H:i

The format used by the date filter to display values when no specific format is passed as an argument.

interval_format

type: string default: %d days

The format used by the date filter to display DateInterval instances when no specific format is passed as argument.

timezone

type: string default: (the value returned by date_default_timezone_get())

The timezone used when formatting date values with the date filter and no specific timezone is passed as an argument.

debug

type: boolean default: %kernel.debug%

If true, the compiled templates include a __toString() method that can be used to display their nodes.

This option also controls the behavior of the Twig dump utilities. If this option is false, the dump() function doesn't output any contents.

default_path

type: string default: %kernel.project_dir%/templates

The path to the directory where Symfony will look for the application Twig templates by default. If you store the templates in more than one directory, use the paths option too.

file_name_pattern

type: string or array of string default: []

Some applications store their front-end assets in the same directory as Twig templates. The lint:twig command filters those files to only lint the ones that match the *.twig filename pattern.

However, the cache:warmup command tries to compile all files, including non-Twig templates (and it ignores compilation errors). The result is an unnecessary consumption of CPU and disk resources.

In those cases, use this option to define the filename pattern(s) of the files that are Twig templates (the rest of files will be ignored by cache:warmup). The value of this option can be a regular expression, a glob, or a string:

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        # config/packages/twig.yaml
twig:
    file_name_pattern: ['*.twig', 'specific_file.html']
    # ...
    

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        <!-- config/packages/twig.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:twig="http://symfony.com/schema/dic/twig"
    xsi:schemaLocation="http://symfony.com/schema/dic/services
        https://symfony.com/schema/dic/services/services-1.0.xsd
        http://symfony.com/schema/dic/twig https://symfony.com/schema/dic/twig/twig-1.0.xsd">

    <twig:config>
        <twig:file-name-pattern>*.twig</twig:file-name-pattern>
        <twig:file-name-pattern>specific_file.html</twig:file-name-pattern>
        <!-- ... -->
    </twig:config>
</container>
    

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        // config/packages/twig.php
use Symfony\Config\TwigConfig;

return static function (TwigConfig $twig): void {
    $twig->fileNamePattern([
        '*.twig',
        'specific_file.html',
    ]);

    // ...
};
    

form_themes

type: array of string default: ['form_div_layout.html.twig']

Defines one or more form themes which are applied to all the forms of the application:

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        # config/packages/twig.yaml
twig:
    form_themes: ['bootstrap_5_layout.html.twig', 'form/my_theme.html.twig']
    # ...
    

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        <!-- config/packages/twig.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:twig="http://symfony.com/schema/dic/twig"
    xsi:schemaLocation="http://symfony.com/schema/dic/services
        https://symfony.com/schema/dic/services/services-1.0.xsd
        http://symfony.com/schema/dic/twig https://symfony.com/schema/dic/twig/twig-1.0.xsd">

    <twig:config>
        <twig:form-theme>bootstrap_5_layout.html.twig</twig:form-theme>
        <twig:form-theme>form/my_theme.html.twig</twig:form-theme>
        <!-- ... -->
    </twig:config>
</container>
    

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        // config/packages/twig.php
use Symfony\Config\TwigConfig;

return static function (TwigConfig $twig): void {
    $twig->formThemes([
        'bootstrap_5_layout.html.twig',
        'form/my_theme.html.twig',
    ]);

    // ...
};
    

The order in which themes are defined is important because each theme overrides all the previous one. When rendering a form field whose block is not defined in the form theme, Symfony falls back to the previous themes until the first one.

These global themes are applied to all forms, even those which use the form_theme Twig tag, but you can disable global themes for specific forms.

globals

type: array default: []

It defines the global variables injected automatically into all Twig templates. Learn more about Twig global variables.

mailer

html_to_text_converter

type: string default: ````

The service implementing HtmlToTextConverterInterface that will be used to automatically create the text part of an email from its HTML contents when not explicitly defined.

number_format

These options define the default values used by the number_format filter to format numeric values. They are useful to avoid passing the same arguments on every number_format filter call.

decimals

type: integer default: 0

The number of decimals used to format numeric values when no specific number is passed as argument to the number_format filter.

decimal_point

type: string default: .

The character used to separate the decimals from the integer part of numeric values when no specific character is passed as argument to the number_format filter.

thousands_separator

type: string default: ,

The character used to separate every group of thousands in numeric values when no specific character is passed as argument to the number_format filter.

optimizations

type: integer default: -1

Twig includes an extension called optimizer which is enabled by default in Symfony applications. This extension analyzes the templates to optimize them when being compiled. For example, if your template doesn't use the special loop variable inside a for tag, this extension removes the initialization of that unused variable.

By default, this option is -1, which means that all optimizations are turned on. Set it to 0 to disable all the optimizations. You can even enable or disable these optimizations selectively, as explained in the Twig documentation about the optimizer extension.

paths

type: array default: null

Defines the directories where application templates are stored in addition to the directory defined in the default_path option:

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        # config/packages/twig.yaml
twig:
    # ...
    paths:
        'email/default/templates': ~
        'backend/templates': 'admin'
    

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        <!-- config/packages/twig.xml -->
<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:twig="http://symfony.com/schema/dic/twig"
    xsi:schemaLocation="http://symfony.com/schema/dic/services
        https://symfony.com/schema/dic/services/services-1.0.xsd
        http://symfony.com/schema/dic/twig https://symfony.com/schema/dic/twig/twig-1.0.xsd">

    <twig:config>
        <!-- ... -->
        <twig:path>email/default/templates</twig:path>
        <twig:path namespace="admin">backend/templates</twig:path>
    </twig:config>
</container>
    

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        // config/packages/twig.php
use Symfony\Config\TwigConfig;

return static function (TwigConfig $twig): void {
    // ...

    $twig->path('email/default/templates', null);
    $twig->path('backend/templates', 'admin');
};
    

Read more about template directories and namespaces.

strict_variables

type: boolean default: %kernel.debug%

If set to true, Symfony shows an exception whenever a Twig variable, attribute or method doesn't exist. If set to false these errors are ignored and the non-existing values are replaced by null.

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

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