Twig's 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 Joi n Reverse length Sort default keys escape raw Merge

The

Date Filter
1.1 has new time zone support, and the 1.5 version adds the 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 \ \
{post.published_at|date ("F JS \\a") before each letter. \\t G:ia ")}}
{{post.published_at|date (" F JS \\a\\t G:ia ")}} Note: After my test, you cannot enter Chinese characters, so write No. {' Now ' |date ("F jS \ \ \ 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 you provide a formatted string that is not supported, it will automatically use the default format (F J, Y h:i) 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
As with the printf function of PHP, to replace the placeholder
{"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 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
1.5 new filters added to the version.
He is the PHP function number_format a wrapper directly see the function reference bar
{{200.35|number_format}}
{{200.35|number_format}} It is also possible to modify the default format with PHP
$twig = new Twig_environment ($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
Directly using the Json_encode function
{{Data|json_encode ()}}
{{Data|json_encode ()}}

Convert_encoding Filter
New additions to version 1.4
Convert a string, the first parameter is the output encoding, the second parameter is the input encoding
This function relies on iconv or mbstring so you need to install at least one
{{data|convert_encoding (' UTF-8 ', ' ISO-2022-JP ')}}
{{data|convert_encoding (' UTF-8 ', ' ISO-2022-JP ')}}

Title Filter
The first letter of each word is capitalized.
{' My first car ' |title}}

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

{# outputs ' My first Car ' #}
Capitalize filter
Turns the string into an uppercase letter, and the remaining lowercase letters are formatted
{' My first car ' |capitalize}}

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

{# outputs ' My first car ' #}

NL2BR Filter
Will change the line character \ n into

{"I like twig.\nyou would like it too." | NL2BR}}
{# outputs

I like Twig.

You'll like it too.

#}
{"I like twig.\nyou would like it too." | NL2BR}}
{# outputs

I like Twig.

You'll like it too.

#}

Upper Lower Filter
Make a string uppercase and lowercase
Striptags Filter
The Strip_tags function is used directly
Join filter
I love that, like Python joins, to concatenate the contents of an array and split them with the 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
Reverses an array, or is 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
Using the Sort function
{% for use in users|sort%}
...
{% ENDFOR%}
{% for use in users|sort%}
...
{% ENDFOR%}
Default Filter
Returns the pre-set content when the variable is not defined or is empty
{{Var|default (' var is not defined ')}}

{{Var.foo|default (' foo item on var ' 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 ' defined ')}}

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

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

Keys Filter
Returns the key array
{% for key in Array|keys%}
...
{% ENDFOR%}
{% for key in Array|keys%}
...
{% ENDFOR%}

Escape filter
Main Escape & < > ' ". And it has a shorthand way of E.
{{User.username|escape}}
{{User.username|e}}
{{User.username|escape}}
{{User.username|e}} can also escape JS
{{user.username|escape (' JS ')}}
{{user.username|e (' JS ')}}
{{user.username|escape (' JS ')}}
{{user.username|e (' JS ')}} actually he's using a 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 '} #}

Excerpt from Jiaochangyun's column

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