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<refentry id="function.Memcache-replace">
 <refnamediv>
  <refname>Memcache::replace</refname>
  <refpurpose>Replace value of the existing item</refpurpose>
 </refnamediv>
 <refsect1>
  <title>Description</title>
  <methodsynopsis>
   <type>bool</type><methodname>Memcache::replace</methodname>
   <methodparam><type>string</type><parameter>key</parameter></methodparam>
   <methodparam><type>mixed</type><parameter>var</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>flag</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>expire</parameter></methodparam>
  </methodsynopsis>
  <para>
   <function>Memcache::replace</function> should be used to replace value of
   existing item with <parameter>key</parameter>. In case if item with such
   key doesn't exists, <function>Memcache::replace</function> returns
   &false;. For the rest <function>Memcache::replace</function> behaves
   similarly to <function>Memcache::set</function>.
  </para>
  <para>
   Also you can use <function>memcache_replace</function> function.
   See example below.
  </para>
  <example>
   <title><function>Memcache::replace</function> example</title>
   <programlisting role="php">
<![CDATA[
<?php

$memcache_obj = memcache_connect('memcache_host', 11211);

/* procedural API */
memcache_replace($memcache_obj, "test_key", "some variable", false, 30);

/* OO API */
$memcache_obj->replace("test_key", "some variable", false, 30);

?>
]]>
   </programlisting>
  </example>
  <para>
   &return.success;
  </para>
  <para>
   See also
   <function>Memcache::set</function>, 
   <function>Memcache::add</function>.
  </para>
 </refsect1>
</refentry>

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