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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.grapheme-strlen" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>grapheme_strlen</refname>
<refpurpose>Get string length in grapheme units</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<para>&style.procedural;</para>
<methodsynopsis>
<type class="union"><type>int</type><type>false</type><type>null</type></type><methodname>grapheme_strlen</methodname>
<methodparam><type>string</type><parameter>string</parameter></methodparam>
</methodsynopsis>
<para>
Get string length in grapheme units (not bytes or characters)
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>string</parameter></term>
<listitem>
<para>
The string being measured for length. It must be a valid UTF-8 string.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
The length of the string on success, &return.falseforfailure;.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><function>grapheme_strlen</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$char_a_ring_nfd = "a\xCC\x8A"; // 'LATIN SMALL LETTER A WITH RING ABOVE' (U+00E5) normalization form "D"
$char_o_diaeresis_nfd = "o\xCC\x88"; // 'LATIN SMALL LETTER O WITH DIAERESIS' (U+00F6) normalization form "D"
print grapheme_strlen( 'abc' . $char_a_ring_nfd . $char_o_diaeresis_nfd . $char_a_ring_nfd);
?>
]]>
</programlisting>
</example>
&example.outputs;
<screen>
<![CDATA[
6
]]>
</screen>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member>
<link xlink:href="&uri.unicode.graphemes;">
Unicode Text Segmentation: Grapheme Cluster Boundaries
</link>
</member>
<member><function>iconv_strlen</function></member>
<member><function>mb_strlen</function></member>
<member><function>strlen</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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