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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.mb-ereg" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>mb_ereg</refname>
<refpurpose>Regular expression match with multibyte support</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>mb_ereg</methodname>
<methodparam><type>string</type><parameter>pattern</parameter></methodparam>
<methodparam><type>string</type><parameter>string</parameter></methodparam>
<methodparam choice="opt"><type>array</type><parameter role="reference">matches</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
<simpara>
Executes the regular expression match with multibyte support.
</simpara>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>pattern</parameter></term>
<listitem>
<para>
The search pattern.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>string</parameter></term>
<listitem>
<para>
The search <type>string</type>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>matches</parameter></term>
<listitem>
<para>
If matches are found for parenthesized substrings of
<parameter>pattern</parameter> and the function is called with the
third argument <parameter>matches</parameter>, the matches will be stored
in the elements of the array <parameter>matches</parameter>.
If no matches are found, <parameter>matches</parameter> is set to an empty
array.
</para>
<para>
<varname>$matches[1]</varname> will contain the substring which starts at
the first left parenthesis; <varname>$matches[2]</varname> will contain
the substring starting at the second, and so on.
<varname>$matches[0]</varname> will contain a copy of the complete string
matched.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns whether <parameter>pattern</parameter> matches <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>
<row>
<entry>8.0.0</entry>
<entry>
This function returns &true; on success now. Previously, it returned the byte length
of the matched string if a match for <parameter>pattern</parameter> was found in
<parameter>string</parameter> and <parameter>matches</parameter> was passed.
If the optional parameter <parameter>matches</parameter> was not passed or
the length of the matched string was <literal>0</literal>, this function returned <literal>1</literal>.
</entry>
</row>
<row>
<entry>7.1.0</entry>
<entry>
<function>mb_ereg</function> will now set <parameter>matches</parameter> to
an empty <type>array</type>, if nothing matched. Formerly,
<parameter>matches</parameter> was not modified in that case.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1><!-- }}} -->
<refsect1 role="notes">
&reftitle.notes;
¬e.mbstring.encoding.internal;
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>mb_regex_encoding</function></member>
<member><function>mb_eregi</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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