``upper``
=========
The ``upper`` filter converts a value to uppercase:
.. code-block:: jinja
{{ 'welcome'|upper }}
{# outputs 'WELCOME' #}
- 首页
- 目录
- 介绍
- 安装
- 面向模板设计师
- 面向开发者
- 扩展 Twig
- Twig的内部构建
- 弃用的特性
- 使用技巧
- 代码规范
- 标签 tags
- autoescape
- block
- do
- embed
- extends
- filter
- flush
- for
- from
- if
- import
- include
- macro
- sandbox
- set
- spaceless
- use
- verbatim
- 过滤器
- abs
- batch
- capitalize
- convert_encoding
- date
- date_modify
- default
- escape
- first
- format
- join
- json_encode
- keys
- last
- length
- lower
- merge
- nl2br
- number_format
- raw
- replace
- reverse
- round
- slice
- sort
- split
- striptags
- title
- trim
- upper
- url_encode
- 函数
- attribute
- block
- constant
- cycle
- date
- dump
- include
- max
- min
- parent
- random
- range
- source
- template_from_string
- 测试
- constant
- defined
- divisibleby
- empty
- even
- iterable
- null
- odd
- sameas