mirror of
https://github.com/sigmasternchen/php-doc-en
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8cdc6621f9
- array functions - datetime functions - mbstring functions - strings functions - var functions - xml functions - json functions
85 lines
2.8 KiB
XML
85 lines
2.8 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<chapter xml:id="mbstring.ja-basic" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<title>Basics of Japanese multi-byte encodings</title>
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<para>
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Japanese characters can only be represented by multibyte encodings,
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and multiple encoding standards are used depending on platform and
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text purpose. To make matters worse, these encoding standards
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differ slightly from one another. In order to create a web
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application which would be usable in a Japanese environment, a
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developer has to keep these complexities in mind to ensure that the
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proper character encodings are used.
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</para>
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<para>
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<itemizedlist>
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<listitem>
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<simpara>Storage for a character can be up to six bytes</simpara>
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</listitem>
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<listitem>
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<simpara>
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Most Japanese multibyte characters appear twice as wide as
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single-byte characters. These characters are called
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"zen-kaku" in Japanese, which means
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"full width". Other, narrower, characters are called
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"han-kaku", which means "half width". The
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graphical properties of the characters, however, depends upon
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the type faces used to display them.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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Some character encodings use shift(escape) sequences defined
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in ISO-2022 to switch the code map of the specific code area
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(<literal>00h</literal> to <literal>7fh</literal>).
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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ISO-2022-JP should be used in SMTP/NNTP, and headers and entities
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should be reencoded as per RFC requirements. Although those are not
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requisites, it's still a good idea because several popular user
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agents cannot recognize any other encoding methods.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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Web pages created for mobile phone services such as
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<link xlink:href="&url.imode;">i-mode</link>
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or <link xlink:href="&url.ezweb;">EZweb</link>
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are supposed to use Shift_JIS.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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Emoji used for mobile phone service such as
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<link xlink:href="&url.imode;">i-mode</link>
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or <link xlink:href="&url.ezweb;">EZweb</link>
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are supported.
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</simpara>
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</listitem>
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</itemizedlist>
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</para>
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</chapter>
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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:"~/.phpdoc/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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