Twig Filters Learning_PHP Tutorial

Currently supported filters include

date format replace number_format url_encode json_encode convert_encoding title capitalize nl2br upper lower striptags join reverse length sort default keys escape raw merge

date filter
Version 1.1 adds time zone support, and version 1.5 adds a default date format.
This filter is infinitely similar to PHP’s date function
{{ post.published_at|date("m/d/Y") }}
{{ "now"|date("m/d/Y") }}
{{ post.published_at|date("m/d/Y") }}
{{ "now"|date("m/d/Y") }}
If you want to output letters in the format, you need to enter \
before each letter {{ post.published_at|date("F jS \a\t g:ia") }}
{{ post.published_at|date("F jS \a\t g:ia") }} Note: After my test, Chinese characters cannot be entered, so writing this way will not work. . {{ 'now'|date("F jS \上\afternoon g:ia") }}
You can specify the time zone
{{ post.published_at|date("m/d/Y", "Europe/Paris") }}
{{ post.published_at|date("m/d/Y", "Europe/Paris") }}
If the format string you provide is not supported, the default format (F j, Y H:i) will be automatically used. You can modify this default format with code
$twig = new Twig_Environment($loader);
$twig->getExtension('core')->setDateFormat('d/m/Y', '%d days');
$twig = new Twig_Environment($loader);
$twig->getExtension('core')->setDateFormat('d/m/Y', '%d days');

format filter
Like PHP’s printf function, it is used to replace placeholders
{{ "I like %s and %s."|format(foo, "bar") }}

{# returns I like foo and bar
If the foo parameter equals to the foo string. #}
{{ "I like %s and %s."|format(foo, "bar") }}

{# returns I like foo and bar
If the foo parameter equals to the foo string. #}

replace filter
See this for yourself{{ "I like %this% and %that%."|replace({'%this%': foo, '%that%': "bar"}) }}

{# returns I like foo and bar
If the foo parameter equals to the foo string. #}
{{ "I like %this% and %that%."|replace({'%this%': foo, '%that%': "bar"}) }}

{# returns I like foo and bar
If the foo parameter equals to the foo string. #}
number_format filter
Version 1.5 adds new filters.
It is a wrapper for the PHP function number_format. Please refer to the function reference directly
{{ 200.35|number_format }}
{{ 200.35|number_format }} In addition, you can use php to modify the default format
$twig = new Twig_Environment($loader);
$twig->getExtension('core')->setNumberFormat(3, ',', '.');
$twig = new Twig_Environment($loader);
$twig->getExtension('core')->setNumberFormat(3, ',', '.');
url_encode filter
This directly uses the urlencode function
{{ data|url_encode() }}
{{ data|url_encode() }}

json_encode filter
Use the json_encode function directly
{{ data|json_encode() }}
{{ data|json_encode() }}

convert_encoding filter
New content added in version 1.4
Convert a string, the first parameter is the output encoding, the second parameter is the input encoding
This function depends on iconv or mbstring so at least one needs to be installed
{{ data|convert_encoding('UTF-8', 'iso-2022-jp') }}
{{ data|convert_encoding('UTF-8', 'iso-2022-jp') }}

title filter
Capitalizes the first letter of each word.
{{ 'my first car'|title }}

{# outputs 'My First Car' #}
{{ 'my first car'|title }}

{# outputs 'My First Car' #}
capitalize filter
The string will be formatted with the first letter in uppercase and the remaining letters in lowercase
{{ 'my first car'|capitalize }}

{# outputs 'My first car' #}
{{ 'my first car'|capitalize }}

{# outputs 'My first car' #}

nl2br filter
will change the newline character n into

{{ "I like Twig.nYou will like it too."|nl2br }}
{# outputs

I like Twig.

You will like it too.

#}
{{ "I like Twig.nYou will like it too."|nl2br }}
{# outputs

I like Twig.

You will like it too.

#}

upper lower filter
Make the string uppercase and lowercase
striptags filter
The strip_tags function is used directly
join filter
I like this very much. It is the same as Python's join. It is used to connect the contents of an array and split it with a specified string.
{{ [1, 2, 3]|join }}
{# returns 123 #}
{{ [1, 2, 3]|join('|') }}
{# returns 1|2|3 #}
{{ [1, 2, 3]|join }}
{# returns 123 #}
{{ [1, 2, 3]|join('|') }}
{# returns 1|2|3 #}

reverse filter
Reverse an array, or an object that implements the Iterator interface
{% for use in users|reverse %}
...
{% endfor %}
{% for use in users|reverse %}
...
{% endfor %}

length filter
Returns the length of an array or string
{% if users|length > 10 %}
...
{% endif %}
{% if users|length > 10 %}
...
{% endif %}

sort filter
The sort function is used
{% for use in users|sort %}
...
{% endfor %}
{% for use in users|sort %}
...
{% endfor %}
default filter
When the variable is undefined or empty, the preset content is returned
{{ var|default('var is not defined') }}

{{ var.foo|default('foo item on var is not defined') }}

{{ var['foo']|default('foo item on var is not defined') }}

{{ ''|default('passed var is empty') }}
{{ var|default('var is not defined') }}

{{ var.foo|default('foo item on var is not defined') }}

{{ var['foo']|default('foo item on var is not defined') }}

{{ ''|default('passed var is empty') }}

keys filter
Return key array
{% for key in array|keys %}
...
{% endfor %}
{% for key in array|keys %}
...
{% endfor %}

escape filter
The main escape is & < > ' ". And it has an abbreviation e.
{{ user.username|escape }}
{{ user.username|e }}
{{ user.username|escape }}
{{ user.username|e }} can also be escaped js
{{ user.username|escape('js') }}
{{ user.username|e('js') }}
{{ user.username|escape('js') }}
{{ user.username|e('js') }} Actually he is using the php function htmlspecialchars

raw filter
Used to mark content that does not need to be escaped inside the autoescape tag.
{% autoescape true %}
{{ var|raw }} {# var won't be escaped #}
{% endautoescape %}
{% autoescape true %}
{{ var|raw }} {# var won't be escaped #}
{% endautoescape %}

merge filter
Used to merge arrays
{% set items = { 'apple': 'fruit', 'orange': 'fruit' } %}

{% set itemsitems = items|merge({ 'peugeot': 'car' }) %}

{# items now contains { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'car' } #}

Excerpted from jiaochangyun’s column

http://www.bkjia.com/PHPjc/478458.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/478458.htmlTechArticleCurrently supported filters include date format replace number_format url_encode json_encode convert_encoding title capitalize nl2br upper lower striptags join reverse length sort defau ...