php-doc-en/reference/mbstring/functions/mb-strimwidth.xml

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<refentry xml:id="function.mb-strimwidth" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>mb_strimwidth</refname>
  <refpurpose>Get truncated string with specified width</refpurpose>
 </refnamediv>
   
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>string</type><methodname>mb_strimwidth</methodname>
   <methodparam><type>string</type><parameter>string</parameter></methodparam>
   <methodparam><type>int</type><parameter>start</parameter></methodparam>
   <methodparam><type>int</type><parameter>width</parameter></methodparam>
   <methodparam choice="opt"><type>string</type><parameter>trim_marker</parameter><initializer>""</initializer></methodparam>
   <methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>encoding</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
  <para>
   Truncates <type>string</type> <parameter>string</parameter> to specified <parameter>width</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>
 </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>start</parameter></term>
     <listitem>
      <para>
       The start position offset. Number of
       characters from the beginning of string (first character is 0),
       or if start is negative, number of characters from the end of the string.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>width</parameter></term>
     <listitem>
      <para>
       The width of the desired trim. Negative widths count from the end of the string.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>trim_marker</parameter></term>
     <listitem>
      <para>
       A string that is added to the end of string 
       when string is truncated.
      </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 truncated <type>string</type>. If <parameter>trim_marker</parameter> is set,
   <parameter>trim_marker</parameter> replaces the last chars to match the <parameter>width</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;
     <row>
      <entry>7.1.0</entry>
      <entry>
       Support for negative <parameter>start</parameter>s and <parameter>width</parameter>s has been added.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>mb_strimwidth</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
echo mb_strimwidth("Hello World", 0, 10, "...");
// output: "Hello W..."
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>mb_strwidth</function></member>
    <member><function>mb_internal_encoding</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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