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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 295806 $ -->
<refentry xml:id="function.wincache-ucache-set" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>wincache_ucache_set</refname>
<refpurpose>
Adds a variable in user cache and overwrites a variable if it already exists in the cache
</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>wincache_ucache_set</methodname>
<methodparam><type>mixed</type><parameter>key</parameter></methodparam>
<methodparam><type>mixed</type><parameter>value</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>ttl</parameter><initializer>0</initializer></methodparam>
</methodsynopsis>
<para>
Adds a variable in user cache. Overwrites a variable if it already exists in the cache.
The added or updated variable remains in the user cache unless its time to live expires or it is
deleted by using <function>wincache_ucache_delete</function> or <function>wincache_ucache_clear</function> functions.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>key</parameter></term>
<listitem>
<para>
Store the variable using this <parameter>key</parameter> name. If a variable with same
<parameter>key</parameter> is already present the function will overwrite the previous
value with the new one. <parameter>key</parameter> is case sensitive.
<parameter>key</parameter> can also take array of name => value pairs where names will be used as
keys. This can be used to add multiple values in the cache in one operation, thus avoiding
race condition.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>value</parameter></term>
<listitem>
<para>
Value of a variable to store. <parameter>Value</parameter> supports all data types except resources, such as file handles.
This paramter is ignored if first argument is an array. A general guidance is to pass <literal>NULL</literal>
as <parameter>value</parameter> while using array as <parameter>key</parameter>.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>ttl</parameter></term>
<listitem>
<para>
Time for the variable to live in the cache in seconds. After the value specified in <parameter>ttl</parameter> has passed
the stored variable will be deleted from the cache. This parameter takes a default value of <literal>0</literal> which means
the variable will stay in the cache unless explicitly deleted by using <function>wincache_ucache_delete</function>
or <function>wincache_ucache_clear</function> functions.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<simpara>
If <parameter>key</parameter> is string, the function returns <literal>TRUE</literal> on success and <literal>FALSE</literal> on failure.
</simpara>
<para>
If <parameter>key</parameter> is an array, the function returns:
<itemizedlist spacing="compact">
<listitem>
<simpara>
If all the name => value pairs in the array can be set, function returns an empty array;
</simpara>
</listitem>
<listitem>
<simpara>
If all the name => value pairs in the array cannot be set, function returns <literal>FALSE</literal>;
</simpara>
</listitem>
<listitem>
<simpara>
If some can be set while others cannot, function returns an array with name=>value pair for which the addition failed in the user cache.
</simpara>
</listitem>
</itemizedlist>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>wincache_ucache_set</function> with <parameter>key</parameter> as a string</title>
<programlisting role="php">
<![CDATA[
<?php
$bar = 'BAR';
var_dump(wincache_ucache_set('foo', $bar));
var_dump(wincache_ucache_get('foo'));
$bar1 = 'BAR1'
var_dump(wincache_ucache_set('foo', $bar1));
var_dump(wincache_ucache_get('foo'));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
bool(true)
string(3) "BAR"
bool(true)
string(3) "BAR1"
]]>
</screen>
</example>
</para>
<para>
<example>
<title><function>wincache_ucache_set</function> with <parameter>key</parameter> as an array</title>
<programlisting role="php">
<![CDATA[
<?php
$colors_array = array('green' => '5', 'Blue' => '6', 'yellow' => '7', 'cyan' => '8');
var_dump(wincache_ucache_set($colors_array));
var_dump(wincache_ucache_set($colors_array));
var_dump(wincache_ucache_get('Blue'));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
array(0) {}
array(0) {}
string(1) "6"
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>wincache_ucache_add</function></member>
<member><function>wincache_ucache_get</function></member>
<member><function>wincache_ucache_delete</function></member>
<member><function>wincache_ucache_clear</function></member>
<member><function>wincache_ucache_exists</function></member>
<member><function>wincache_ucache_meminfo</function></member>
<member><function>wincache_ucache_info</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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