Twig 的 tags学习（中文） 之二(4)

你可以给模板添加变量

{# the foo template will have access to the variables from the current context and the foo one #} 
{% include 'foo' with {'foo': 'bar'} %} 
 
{% set vars = {'foo': 'bar'} %} 
{% include 'foo' with vars %} 
{# the foo template will have access to the variables from the current context and the foo one #}
{% include 'foo' with {'foo': 'bar'} %}

{% set vars = {'foo': 'bar'} %}
{% include 'foo' with vars %}
你也可以使用 only 关键字 来禁止载入的模板使用当前模板的变量，只能使用include 时with的变量{# only the foo variable will be accessible #} 
{% include 'foo' with {'foo': 'bar'} only %} 
 
{# no variable will be accessible #} 
{% include 'foo' only %} 
{# only the foo variable will be accessible #}
{% include 'foo' with {'foo': 'bar'} only %}

{# no variable will be accessible #}
{% include 'foo' only %}

载入的模板名也可以是一个twig表达式

{% include some_var %} 
{% include ajax ? 'ajax.html' : 'not_ajax.html' %} 
{% include some_var %}
{% include ajax ? 'ajax.html' : 'not_ajax.html' %}
也可以用twig模板对象

$template = $twig->loadTemplate('some_template.twig'); 
 
$twig->loadTemplate('template.twig')->display(array('template' => $template)); 
$template = $twig->loadTemplate('some_template.twig');

$twig->loadTemplate('template.twig')->display(array('template' => $template));

1.2版本新加内容，可以在模板加上 ignore missing 关键字，这样当模板不存在的时候就不会引发错误。

{% include "sidebar.html" ignore missing %} 
{% include "sidebar.html" ignore missing with {'foo': 'bar} %} 
{% include "sidebar.html" ignore missing only %} 
{% include "sidebar.html" ignore missing %}
{% include "sidebar.html" ignore missing with {'foo': 'bar} %}
{% include "sidebar.html" ignore missing only %}1.2版本新加内容，你可以给include传递一个数组，他会自动载入第一个存在的模板{% include ['page_detailed.html', 'page.html'] %} 
{% include ['page_detailed.html', 'page.html'] %}

import 标签

twig允许把一些常用的代码放入到macros（宏）里，这些macros被不同的模板导入。

有两种方法导入模板，你可以导入整个模板到一个变量里，或者只导入需要的几个macros

假如我们有个助手模块，来帮助我们渲染表单（forms.html）