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<sect1 id="zend.mail.character-sets">
    <title>Character Sets</title>

    <para>
        <classname>Zend_Mail</classname> does not check for the correct character set of the mail
        parts. When instantiating <classname>Zend_Mail</classname>, a charset for the e-mail itself
        may be given. It defaults to <emphasis>iso-8859-1</emphasis>. The application has to make
        sure that all parts added to that mail object have their content encoded in the correct
        character set. When creating a new mail part, a different charset can be given for each
        part.
    </para>

    <note>
        <title>Only in text format</title>

        <para>
            Character sets are only applicable for message parts in text format.
        </para>
    </note>

    <example id="zend.mail.character-sets.cjk">
        <title>Usage in CJK languages</title>

        <para>
            The following example is how to use <classname>Zend_Mail</classname> in Japanese. This
            is one of <acronym>CJK</acronym> (aka <acronym>CJKV</acronym> ) languages. If you use
            Chinese, you may use <acronym>HZ-GB-2312</acronym> instead of
            <acronym>ISO-2022-JP</acronym>.
        </para>

        <programlisting language="php"><![CDATA[
//We suppose that character encoding of strings is UTF-8 on PHP script.
function myConvert($string) {
    return mb_convert_encoding($string, 'ISO-2022-JP', 'UTF-8');
}

$mail = new Zend_Mail('ISO-2022-JP');
// In this case, you can use ENCODING_7BIT
// because the ISO-2022-JP does not use MSB.
$mail->setBodyText(
    myConvert('This is the text of the mail.'),
    null,
    Zend_Mime::ENCODING_7BIT
);
$mail->setHeaderEncoding(Zend_Mime::ENCODING_BASE64);
$mail->setFrom('somebody@example.com', myConvert('Some Sender'));
$mail->addTo('somebody_else@example.com', myConvert('Some Recipient'));
$mail->setSubject(myConvert('TestSubject'));
$mail->send();
]]></programlisting>
    </example>
</sect1>
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