Information

TwigExtensionsBundle is just a collection of Twig extensions i find useful.

DecorateEmptyValueExtension

Provides an enhanced default filter to decorate empty values with a placeholder which can even be HTML.

Usually, if you want to use HTML, e.g. the HTML entity "—", as value for the default filter in an HTML Twig template you have to do cumbersome

{{ somevalue | e | default('—') | raw }}

to make it render properly. With this extension you can write

{{ somevalue | craue_default }}

instead.

ArrayHelperExtension

Provides a without filter wrapping PHP's array_diff function.

FormatDateTimeExtension

Provides filters for locale-aware formatting of date, time, and date/time values.

ChangeLanguageExtension

Providing helpers for implementing a language change mechanism and handling localized routes.

Installation

Add TwigExtensionsBundle to your vendor/Craue directory

git submodule add git://github.com/craue/TwigExtensionsBundle.git vendor/Craue/TwigExtensionsBundle

Add TwigExtensionsBundle to your application kernel

// app/AppKernel.php
public function registerBundles() {
	$bundles = array(
		// ...
		new Craue\TwigExtensionsBundle\CraueTwigExtensionsBundle(),
	);
	// ...
}

Register the Craue namespace

// app/autoload.php
$loader->registerNamespaces(array(
	// ...
	'Craue' => __DIR__.'/../vendor',
));

Make the Twig extensions available by updating your configuration

// app/config/config.yml
craue_twig_extensions: ~

Examples to use the extensions in your Twig template

DecorateEmptyValueExtension

{{ someValueWhichMayBeEmpty | craue_default }}<br />
{{ someValueWhichMayBeEmpty | craue_default('no value') }}<br />
{{ someValueWhichMayBeEmpty | craue_default('&ndash;') }}<br />
{{ someValueWhichMayBeEmpty | craue_default(0) }}

ArrayHelperExtension

{{ anArray | craue_without(aValueOrAnArray) | join(', ') }}<br/ >
{{ ['red', 'green', 'yellow', 'blue'] | craue_without('yellow') | join(', ') }} will print "red, green, blue"<br/ >
{{ ['red', 'green', 'yellow', 'blue'] | craue_without(['yellow', 'black', 'red']) | join(', ') }} will print "green, blue"

FormatDateTimeExtension

<h2>with current locale</h2>
date: {{ someDateTimeValue | craue_date }}<br />
time: {{ someDateTimeValue | craue_time }}<br />
both: {{ someDateTimeValue | craue_datetime }}

<h2>with specific locales</h2>
date: {{ someDateTimeValue | craue_date('de-DE') }}<br />
time: {{ someDateTimeValue | craue_time('de') }}<br />
both: {{ someDateTimeValue | craue_datetime('en-GB') }}

ChangeLanguageExtension

Rendering links for some kind of "change language" menu:

<ul>
	{% for locale in craue_availableLocales %}
		<li>
			{% if locale == app.session.locale %}
				{{ craue_languageName(locale) }}
			{% else %}
				<a href="{{ path(app.request.attributes.get('_route'), app.request.attributes.all
						| craue_cleanRouteParameters | merge({'_locale': locale})) }}"
					>{{ craue_languageName(locale) }}</a>
			{% endif %}
		</li>
	{% endfor %}
</ul>

Additionally, instead of

<a href="{{ path('route', {'_locale': app.session.locale}) }}">text</a>

you can use

<a href="{{ craue_localizedPath('route') }}">text</a>

to build links containing the current locale.

Set/override default values

DecorateEmptyValueExtension

; app/config/parameters.ini
craue_twig_extensions.decorateEmptyValue.placeholder="–"

FormatDateTimeExtension

; app/config/parameters.ini
craue_twig_extensions.formatDateTime.datetype="full"
craue_twig_extensions.formatDateTime.timetype="short"

ChangeLanguageExtension

; app/config/parameters.ini
craue_twig_extensions.changeLanguage.availableLocales[]="de"
craue_twig_extensions.changeLanguage.availableLocales[]="en"
craue_twig_extensions.changeLanguage.availableLocales[]="ru"
craue_twig_extensions.changeLanguage.showForeignLanguageNames=true
craue_twig_extensions.changeLanguage.showFirstUppercase=false

With XML for example you can also set the keys to be more specific about the locales:

<parameter key="craue_twig_extensions.changeLanguage.availableLocales" type="collection">
	<parameter key="de_DE">de</parameter>
	<parameter key="en">en</parameter>
	<parameter key="ru">ru</parameter>
</parameter>

Advanced stuff

DecorateEmptyValueExtension

Alias

You can define an alias for the filter if you don't like to write

{{ somevalue | craue_default }}

all the time. Setting this to "d" for example with

; app/config/parameters.ini
craue_twig_extensions.decorateEmptyValue.filterAlias="d"

allows you to write

{{ somevalue | d }}

in your Twig Template. But pay attention to not accidentally override built-in filters, although you can do it intentionally, e.g. by setting the alias to "default".

ArrayHelperExtension

Alias

Similar to the DecorateEmptyValueExtension you can define an alias:

; app/config/parameters.ini
craue_twig_extensions.arrayHelper.withoutAlias="without"

But, again, pay attention to not accidentally override built-in filters, although you can do it intentionally.

FormatDateTimeExtension

Aliases

Again, you can define an alias for each filter:

; app/config/parameters.ini
craue_twig_extensions.formatDateTime.dateFilterAlias="date"
craue_twig_extensions.formatDateTime.timeFilterAlias="time"
craue_twig_extensions.formatDateTime.dateTimeFilterAlias="datetime"

Don't accidentally override built-in filters, although you can do it intentionally, e.g. by setting the dateFilterAlias to "date".

ChangeLanguageExtension

Aliases

Again, you can define aliases:

; app/config/parameters.ini
craue_twig_extensions.changeLanguage.languageNameAlias=
craue_twig_extensions.changeLanguage.localizedPathAlias="path"
craue_twig_extensions.changeLanguage.cleanRouteParametersAlias=
craue_twig_extensions.changeLanguage.availableLocalesAlias=

Don't accidentally override built-in filters/functions/globals, although you can do it intentionally, e.g. by setting the localizedPathAlias to "path".