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``u``
=====
The ``u`` filter wraps a text in a Unicode object (a `Symfony UnicodeString
instance <https://symfony.com/doc/current/components/string.html>`_) that
exposes methods to "manipulate" the string.
Let's see some common use cases.
Wrapping a text to a given number of characters:
.. code-block:: twig
{{ 'Symfony String + Twig = <3'|u.wordwrap(5) }}
Symfony
String
+
Twig
= <3
Here, ``u`` is the filter and ``wordwrap(5)`` is a method called on the result
of the filter; it's equivalent to ``(text|u).wordwrap(5)``.
Truncating a string:
.. code-block:: twig
{{ 'Lorem ipsum'|u.truncate(8) }}
Lorem ip
{{ 'Lorem ipsum'|u.truncate(8, '...') }}
Lorem...
The ``truncate`` method also accepts a third argument to preserve whole words:
.. code-block:: twig
{{ 'Lorem ipsum dolor'|u.truncate(10, '...', false) }}
Lorem ipsum...
Converting a string to *snake* case or *camelCase*:
.. code-block:: twig
{{ 'SymfonyStringWithTwig'|u.snake }}
symfony_string_with_twig
{{ 'symfony_string with twig'|u.camel.title }}
SymfonyStringWithTwig
You can also chain methods:
.. code-block:: twig
{{ 'Symfony String + Twig = <3'|u.wordwrap(5).upper }}
SYMFONY
STRING
+
TWIG
= <3
.. note::
The ``u`` filter is part of the ``StringExtension`` which is not installed
by default. Install it first:
.. code-block:: bash
$ composer require twig/string-extra
Then, on Symfony projects, install the ``twig/extra-bundle``:
.. code-block:: bash
$ composer require twig/extra-bundle
Otherwise, add the extension explicitly on the Twig environment::
use Twig\Extra\String\StringExtension;
$twig = new \Twig\Environment(...);
$twig->addExtension(new StringExtension());
|
