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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.mb-strwidth" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>mb_strwidth</refname>
<refpurpose>Return width of string</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>mb_strwidth</methodname>
<methodparam><type>string</type><parameter>string</parameter></methodparam>
<methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>encoding</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<para>
Returns the width of <type>string</type> <parameter>string</parameter>,
where halfwidth characters count as <literal>1</literal>, and fullwidth
characters count as <literal>2</literal>.
See <link xlink:href="&url.unicode.reports.tr;11/">&url.unicode.reports.tr;11/</link>
for details regarding East Asian character widths.
</para>
<para>
The fullwidth characters are:
<literal>U+1100</literal>-<literal>U+115F</literal>,
<literal>U+11A3</literal>-<literal>U+11A7</literal>,
<literal>U+11FA</literal>-<literal>U+11FF</literal>,
<literal>U+2329</literal>-<literal>U+232A</literal>,
<literal>U+2E80</literal>-<literal>U+2E99</literal>,
<literal>U+2E9B</literal>-<literal>U+2EF3</literal>,
<literal>U+2F00</literal>-<literal>U+2FD5</literal>,
<literal>U+2FF0</literal>-<literal>U+2FFB</literal>,
<literal>U+3000</literal>-<literal>U+303E</literal>,
<literal>U+3041</literal>-<literal>U+3096</literal>,
<literal>U+3099</literal>-<literal>U+30FF</literal>,
<literal>U+3105</literal>-<literal>U+312D</literal>,
<literal>U+3131</literal>-<literal>U+318E</literal>,
<literal>U+3190</literal>-<literal>U+31BA</literal>,
<literal>U+31C0</literal>-<literal>U+31E3</literal>,
<literal>U+31F0</literal>-<literal>U+321E</literal>,
<literal>U+3220</literal>-<literal>U+3247</literal>,
<literal>U+3250</literal>-<literal>U+32FE</literal>,
<literal>U+3300</literal>-<literal>U+4DBF</literal>,
<literal>U+4E00</literal>-<literal>U+A48C</literal>,
<literal>U+A490</literal>-<literal>U+A4C6</literal>,
<literal>U+A960</literal>-<literal>U+A97C</literal>,
<literal>U+AC00</literal>-<literal>U+D7A3</literal>,
<literal>U+D7B0</literal>-<literal>U+D7C6</literal>,
<literal>U+D7CB</literal>-<literal>U+D7FB</literal>,
<literal>U+F900</literal>-<literal>U+FAFF</literal>,
<literal>U+FE10</literal>-<literal>U+FE19</literal>,
<literal>U+FE30</literal>-<literal>U+FE52</literal>,
<literal>U+FE54</literal>-<literal>U+FE66</literal>,
<literal>U+FE68</literal>-<literal>U+FE6B</literal>,
<literal>U+FF01</literal>-<literal>U+FF60</literal>,
<literal>U+FFE0</literal>-<literal>U+FFE6</literal>,
<literal>U+1B000</literal>-<literal>U+1B001</literal>,
<literal>U+1F200</literal>-<literal>U+1F202</literal>,
<literal>U+1F210</literal>-<literal>U+1F23A</literal>,
<literal>U+1F240</literal>-<literal>U+1F248</literal>,
<literal>U+1F250</literal>-<literal>U+1F251</literal>,
<literal>U+20000</literal>-<literal>U+2FFFD</literal>,
<literal>U+30000</literal>-<literal>U+3FFFD</literal>.
All other characters are halfwidth characters.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>string</parameter></term>
<listitem>
<para>
The <type>string</type> being decoded.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>encoding</parameter></term>
<listitem>
&mbstring.encoding.parameter;
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
The width of <type>string</type> <parameter>string</parameter>.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&mbstring.changelog.encoding-nullable;
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example xml:id="mb-strwidth.example.basic">
<title><function>mb_strwidth</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
var_dump(
mb_strwidth('a'), // LATIN SMALL LETTER A
mb_strwidth("\u{ff41}") // FULLWIDTH LATIN SMALL LETTER A
);
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
int(1)
int(2)
]]>
</screen>
</example>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>mb_strimwidth</function></member>
<member><function>mb_internal_encoding</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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