Is it possible to define inline templates in Twig?

php, twig

Solution

The quick solution

Based on your comments about what you really want, I believe the "block version" of the set tag is what you need, i.e.:

{% set variableName %}
<p>
    Content block with <i>line-breaks</i>
    and {{ whatever }} else you need.
</p>
{% endset %}

Then whatever chunks of markup that you need can be passed to a macro (as others have suggested):

{% macro input_wrapper(label, name, controls) %}
<div class="control-group">
    <label class="control-label" for="{{ name }}">{{ label }}</label>
    <div class="controls">{{ controls }}</div>
</div>
{% endmacro %}

{% set label, name = "Age", "age" %}
{% set controls %}
<select name="age">
    <option>...</option>
</select>
{% endset %}

{% import _self as inline %}
{{ inline.input_wrapper(label, name, controls) }}

The real solution

As for the original question, I've done some research and found out that you can define inline templates with a combination of the set and verbatim tags plus the template_from_string function.

The content of the template, however, depends on how you want to use it:

- If you're happy with setting variables using the block syntax, use the include tag or function.

- If you need to use blocks, as in your original example, you will have to use the embed tag.

Example using variables and include tag

{# Defining the template #}
{% set input_wrapper_string %}
{% verbatim %}
<div class="control-group">
    <label class="control-label" for="{{ name }}">{{ label }}</label>
    <div class="controls">{{ controls }}</div>
</div>
{% endverbatim %}
{% endset %}
{% set input_wrapper_tpl = template_from_string(input_wrapper_string) %}

{# Setting the variables #}
{% set label, name = "Age3", "age" %}
{% set controls %}
<select name="age">
    <option>...</option>
</select>
{% endset %}

{# "Rendering" the template #}
{% include input_wrapper_tpl %}

Example using blocks and embed tag

{# Defining the template #}
{% set input_wrapper_string %}
{% verbatim %}
<div class="control-group">
    <label class="control-label" for="{% block name %}{% endblock %}">{% block label %}{% endblock %}</label>
    <div class="controls">{% block controls %}{% endblock %}</div>
</div>
{% endverbatim %}
{% endset %}
{% set input_wrapper_tpl = template_from_string(input_wrapper_string) %}

{# "Rendering" the template and overriding the blocks #}
{% embed input_wrapper_tpl %}
    {% block label %}Age{% endblock %}
    {% block name  %}age{% endblock %}
    {% block controls %}
    <select name="age">
        <option>...</option>
    </select>
    {% endblock %}
{% endembed %}

Problem

Original source