smarty/docs/en/designers/language-custom-functions/language-function-mailto.xml

<?xml version="1.0" encoding="iso-8859-1"?>
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<sect1 id="language.function.mailto">
 <title>{mailto}</title>
  <para>
   {mailto} automates the creation of mailto: links and optionally
   encodes them. Encoding e-mails makes it more difficult for
   web spiders to lift e-mail addresses off of your site.
 </para>
 
 <informaltable frame="all">
  <tgroup cols="5">
   <colspec colname="param" align="center" />
   <colspec colname="type" align="center" />
   <colspec colname="required" align="center" />
   <colspec colname="default" align="center" />
   <colspec colname="desc" />
   <thead>
    <row>
     <entry>Attribute Name</entry>
     <entry>Type</entry>
     <entry>Required</entry>
     <entry>Default</entry>
     <entry>Description</entry>
    </row>
   </thead>
   <tbody>
    <row>
     <entry>address</entry>
     <entry>string</entry>
     <entry>Yes</entry>
     <entry><emphasis>n/a</emphasis></entry>
     <entry>the e-mail address</entry>
    </row>
    <row>
     <entry>text</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>n/a</emphasis></entry>
     <entry>the text to display, default is the e-mail address</entry>
    </row>
    <row>
     <entry>encode</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>none</emphasis></entry>
     <entry>How to encode the e-mail. Can be one of <literal>none</literal>,
      <literal>hex</literal>, <literal>javascript</literal>
      or <literal>javascript_charcode</literal>.</entry>
    </row>
    <row>
     <entry>cc</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>n/a</emphasis></entry>
     <entry>e-mail addresses to carbon copy. Separate entries by a comma.
     </entry>
    </row>
    <row>
     <entry>bcc</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>n/a</emphasis></entry>
     <entry>e-mail addresses to blind carbon copy.
      Separate entries by a comma.</entry>
    </row>
    <row>
     <entry>subject</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>n/a</emphasis></entry>
     <entry>e-mail subject.</entry>
    </row>
    <row>
     <entry>newsgroups</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>n/a</emphasis></entry>
     <entry>newsgroups to post to. Separate entries by a comma.</entry>
    </row>
    <row>
     <entry>followupto</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>n/a</emphasis></entry>
     <entry>addresses to follow up to. Separate entries by a comma.</entry>
    </row>
    <row>
     <entry>extra</entry>
     <entry>string</entry>
     <entry>No</entry>
     <entry><emphasis>n/a</emphasis></entry>
     <entry>any extra information you want passed to the link, such
      as style sheet classes</entry>
    </row>
   </tbody>
  </tgroup>
 </informaltable>

 <note>
  <title>Technical Note</title>
  <para>
   javascript is probably the most thorough form of
   encoding, although you can use hex encoding too.
  </para>
 </note>
 <example>
  <title>{mailto}</title>
  <programlisting>
<![CDATA[
   {mailto address="me@example.com"}
<a href="mailto:me@example.com" >me@example.com</a>

   {mailto address="me@example.com" text="send me some mail"}
<a href="mailto:me@example.com" >send me some mail</a>

   {mailto address="me@example.com" encode="javascript"}
<script type="text/javascript" language="javascript">
 eval(unescape('%64%6f% ... snipped ...%61%3e%27%29%3b'))
</script>

   {mailto address="me@example.com" encode="hex"}
<a href="mailto:%6d%65.. snipped..3%6f%6d">&#x6d;&..snipped...#x6f;&#x6d;</a>

   {mailto address="me@example.com" subject="Hello to you!"}
   <a href="mailto:me@example.com?subject=Hello%20to%20you%21" >me@example.com</a>

{mailto address="me@example.com" cc="you@example.com,they@example.com"}
   <a href="mailto:me@example.com?cc=you@example.com%2Cthey@example.com" >me@example.com</a>

{mailto address="me@example.com" extra='class="email"'}
   <a href="mailto:me@example.com" class="email">me@example.com</a>

{mailto address="me@example.com" encode="javascript_charcode"}
   <script type="text/javascript" language="javascript">
   <!--
{document.write(String.fromCharCode(60,97, ... snipped ....60,47,97,62))}
   //-->
   </script>
]]>
</programlisting>
 </example>
 <para>
 See also
 <link linkend="language.modifier.escape">escape</link>,
 <link linkend="tips.obfuscating.email">Obfuscating E-mail Addresses</link>
 and
 <link linkend="language.function.textformat">{textformat}</link>

 </para>
</sect1>
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