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<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.eregi-replace">
 <refnamediv>
  <refname>eregi_replace</refname>
  <refpurpose>Replace regular expression case insensitive</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>string</type><methodname>eregi_replace</methodname>
   <methodparam><type>string</type><parameter>pattern</parameter></methodparam>
   <methodparam><type>string</type><parameter>replacement</parameter></methodparam>
   <methodparam><type>string</type><parameter>string</parameter></methodparam>
  </methodsynopsis>
  <para>
   This function is identical to <function>ereg_replace</function>
   except that this ignores case distinction when matching
   alphabetic characters.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>pattern</parameter></term>
     <listitem>
      <para>
       A POSIX extended regular expression.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>replacement</parameter></term>
     <listitem>
      <para>
       If <parameter>pattern</parameter> contains parenthesized substrings,
       <parameter>replacement</parameter> may contain substrings of the form
       <literal>\\<replaceable>digit</replaceable></literal>, which will be
       replaced by the text matching the digit'th parenthesized substring; 
       <literal>\\0</literal> will produce the entire contents of string.
       Up to nine substrings may be used. Parentheses may be nested, in which
       case they are counted by the opening parenthesis.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>string</parameter></term>
     <listitem>
      <para>
       The input string.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   The modified string is returned. If no matches are found in 
   <parameter>string</parameter>, then it will be returned unchanged.
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Highlight search results</title>
    <programlisting role="php">
<![CDATA[
<?php
$pattern = '(>[^<]*)('. quotemeta($_GET['search']) .')';
$replacement = '\\1<span class="search">\\2</span>';
$body = eregi_replace($pattern, $replacement, $body);
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>ereg</function></member>
    <member><function>eregi</function></member>
    <member><function>ereg_replace</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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