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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.6 $ -->
<refentry xml:id="function.memcache-replace" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>Memcache::replace</refname>
<refpurpose>Replace value of the existing item</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<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>.
Also you can use <function>memcache_replace</function> function.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>key</parameter></term>
<listitem>
<para>
The key that will be associated with the item.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>var</parameter></term>
<listitem>
<para>
The variable to store. Strings and integers are stored as is, other
types are stored serialized.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>flag</parameter></term>
<listitem>
<para>
Use <constant>MEMCACHE_COMPRESSED</constant> to store the item
compressed (uses zlib).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>expire</parameter></term>
<listitem>
<para>
Expiration time of the item. If it's equal to zero, the item will never
expire. You can also use Unix timestamp or a number of seconds starting
from current time, but in the latter case the number of seconds may not
exceed 2592000 (30 days).
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<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>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>Memcache::set</function></member>
<member><function>Memcache::add</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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