mirror of
https://github.com/smarty-php/smarty.git
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116 lines
3.3 KiB
XML
116 lines
3.3 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision$ -->
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<sect1 id="plugins.modifiers"><title>Modifiers</title>
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<para>
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Modifiers are little functions that are applied to a variable in the
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template before it is displayed or used in some other context.
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Modifiers can be chained together.
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</para>
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<funcsynopsis>
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<funcprototype>
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<funcdef>mixed <function>smarty_modifier_<replaceable>name</replaceable></function></funcdef>
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<paramdef>mixed <parameter>$value</parameter></paramdef>
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<paramdef>[mixed <parameter>$param1</parameter>, ...]</paramdef>
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</funcprototype>
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</funcsynopsis>
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<para>
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The first parameter to the modifier plugin is the value on which
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the modifier is supposed to operate. The rest of the parameters can be
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optional, depending on what kind of operation is supposed to be
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performed.
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</para>
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<para>
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The modifier has to return the result of its processing.
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</para>
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<para>
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See also
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<link linkend="api.register.modifier">register_modifier()</link>,
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<link linkend="api.unregister.modifier">unregister_modifier()</link>.
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</para>
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<example>
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<title>simple modifier plugin</title>
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<para>
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This plugin basically aliases one of the built-in PHP functions. It
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does not have any additional parameters.
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</para>
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<programlisting role="php">
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<![CDATA[
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<?php
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/*
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* Smarty plugin
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* -------------------------------------------------------------
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* File: modifier.capitalize.php
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* Type: modifier
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* Name: capitalize
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* Purpose: capitalize words in the string
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* -------------------------------------------------------------
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*/
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function smarty_modifier_capitalize($string)
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{
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return ucwords($string);
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}
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?>
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]]>
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</programlisting>
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</example>
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<para></para>
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<example>
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<title>more complex modifier plugin</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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/*
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* Smarty plugin
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* -------------------------------------------------------------
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* File: modifier.truncate.php
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* Type: modifier
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* Name: truncate
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* Purpose: Truncate a string to a certain length if necessary,
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* optionally splitting in the middle of a word, and
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* appending the $etc string.
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* -------------------------------------------------------------
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*/
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function smarty_modifier_truncate($string, $length = 80, $etc = '...',
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$break_words = false)
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{
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if ($length == 0)
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return '';
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if (strlen($string) > $length) {
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$length -= strlen($etc);
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$fragment = substr($string, 0, $length+1);
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if ($break_words)
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$fragment = substr($fragment, 0, -1);
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else
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$fragment = preg_replace('/\s+(\S+)?$/', '', $fragment);
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return $fragment.$etc;
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} else
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return $string;
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}
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?>
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]]>
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</programlisting>
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</example>
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</sect1>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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