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+Variable Modifiers {#language.modifiers}
+==================
+
+## Table of contents
+- [capitalize](./language-modifiers/language-modifier-capitalize.md)
+- [cat](./language-modifiers/language-modifier-cat.md)
+- [count_characters](./language-modifiers/language-modifier-count-characters.md)
+- [count_paragraphs](./language-modifiers/language-modifier-count-paragraphs.md)
+- [count_sentences](./language-modifiers/language-modifier-count-sentences.md)
+- [count_words](./language-modifiers/language-modifier-count-words.md)
+- [date_format](./language-modifiers/language-modifier-date-format.md)
+- [default](./language-modifiers/language-modifier-default.md)
+- [escape](./language-modifiers/language-modifier-escape.md)
+- [from_charset](./language-modifiers/language-modifier-from-charset.md)
+- [indent](./language-modifiers/language-modifier-indent.md)
+- [lower](./language-modifiers/language-modifier-lower.md)
+- [nl2br](./language-modifiers/language-modifier-nl2br.md)
+- [regex_replace](./language-modifiers/language-modifier-regex-replace.md)
+- [replace](./language-modifiers/language-modifier-replace.md)
+- [spacify](./language-modifiers/language-modifier-spacify.md)
+- [string_format](./language-modifiers/language-modifier-string-format.md)
+- [strip](./language-modifiers/language-modifier-strip.md)
+- [strip_tags](./language-modifiers/language-modifier-strip-tags.md)
+- [to_charset](./language-modifiers/language-modifier-to-charset.md)
+- [truncate](./language-modifiers/language-modifier-truncate.md)
+- [unescape](./language-modifiers/language-modifier-unescape.md)
+- [upper](./language-modifiers/language-modifier-upper.md)
+- [wordwrap](./language-modifiers/language-modifier-wordwrap.md)
+
+Variable modifiers can be applied to
+[variables](./language-variables.md), [custom
+functions](./language-custom-functions.md) or strings. To apply a modifier,
+specify the value followed by a `|` (pipe) and the modifier name. A
+modifier may accept additional parameters that affect its behavior.
+These parameters follow the modifier name and are separated by a `:`
+(colon). Also, *all php-functions can be used as modifiers implicitly*
+(more below) and modifiers can be
+[combined](./language-combining-modifiers.md).
+
+
+    {* apply modifier to a variable *}
+    {$title|upper}
+
+    {* modifier with parameters *}
+    {$title|truncate:40:"..."}
+
+    {* apply modifier to a function parameter *}
+    {html_table loop=$myvar|upper}
+
+    {* with parameters *}
+    {html_table loop=$myvar|truncate:40:"..."}
+
+    {* apply modifier to literal string *}
+    {"foobar"|upper}
+
+    {* using date_format to format the current date *}
+    {$smarty.now|date_format:"%Y/%m/%d"}
+
+    {* apply modifier to a custom function *}
+    {mailto|upper address="smarty@example.com"}
+
+    {* using  php's str_repeat *}
+    {"="|str_repeat:80}
+
+    {* php's count *}
+    {$myArray|@count}
+
+    {* this will uppercase and truncate the whole array *}
+    <select name="name_id">
+    {html_options output=$my_array|upper|truncate:20}
+    </select>
+
+      
+
+- Modifiers can be applied to any type of variables, including arrays
+    and objects.
+
+    > **Note**
+    >
+    > The default behavior was changed with Smarty 3. In Smarty 2.x, you
+    > had to use an \"`@`\" symbol to apply a modifier to an array, such
+    > as `{$articleTitle|@count}`. With Smarty 3, the \"`@`\" is no
+    > longer necessary, and is ignored.
+    >
+    > If you want a modifier to apply to each individual item of an
+    > array, you will either need to loop the array in the template, or
+    > provide for this functionality inside your modifier function.
+
+    > **Note**
+    >
+    > Second, in Smarty 2.x, modifiers were applied to the result of
+    > math expressions like `{8+2}`, meaning that
+    > `{8+2|count_characters}` would give `2`, as 8+2=10 and 10 is two
+    > characters long. With Smarty 3, modifiers are applied to the
+    > variables or atomic expressions before executing the calculations,
+    > so since 2 is one character long, `{8+2|count_characters}`
+    > gives 9. To get the old result use parentheses like
+    > `{(8+2)|count_characters}`.
+
+- Modifiers are autoloaded from the
+    [`$plugins_dir`](../programmers/api-variables/variable-plugins-dir.md) or can be registered
+    explicitly with the [`registerPlugin()`](../programmers/api-functions/api-register-plugin.md)
+    function. The later is useful for sharing a function between php
+    scripts and smarty templates.
+
+- All php-functions can be used as modifiers implicitly, as
+    demonstrated in the example above. However, using php-functions as
+    modifiers has two little pitfalls:
+
+    -   First - sometimes the order of the function-parameters is not
+        the desirable one. Formatting `$foo` with
+        `{"%2.f"|sprintf:$foo}` actually works, but asks for the more
+        intuitive, like `{$foo|string_format:"%2.f"}` that is provided
+        by the Smarty distribution.
+
+    -   Secondly - if security is enabled, all php-functions that are to
+        be used as modifiers have to be declared trusted in the
+        `$modifiers` property of the securty policy. See the
+        [Security](../programmers/advanced-features/advanced-features-security.md) section for details.
+
+See also [`registerPlugin()`](../programmers/api-functions/api-register-plugin.md), [combining
+modifiers](./language-combining-modifiers.md). and [extending smarty with
+plugins](../programmers/plugins.md)