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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.apcu-inc" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>apcu_inc</refname>
<refpurpose>Increase a stored number</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>int</type><type>false</type></type><methodname>apcu_inc</methodname>
<methodparam><type>string</type><parameter>key</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>step</parameter><initializer>1</initializer></methodparam>
<methodparam choice="opt"><type>bool</type><parameter role="reference">success</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>ttl</parameter><initializer>0</initializer></methodparam>
</methodsynopsis>
<para>
Increases a stored number.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>key</parameter></term>
<listitem>
<para>
The key of the value being increased.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>step</parameter></term>
<listitem>
<para>
The step, or value to increase.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>success</parameter></term>
<listitem>
<para>
Optionally pass the success or fail boolean value to
this referenced variable.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>ttl</parameter></term>
<listitem>
<para>
TTL to use if the operation inserts a new value (rather than incrementing an existing one).
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the current value of <parameter>key</parameter>'s value on success,
&return.falseforfailure;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><function>apcu_inc</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
echo "Let's do something with success", PHP_EOL;
apcu_store('anumber', 42);
echo apcu_fetch('anumber'), PHP_EOL;
echo apcu_inc('anumber'), PHP_EOL;
echo apcu_inc('anumber', 10), PHP_EOL;
echo apcu_inc('anumber', 10, $success), PHP_EOL;
var_dump($success);
echo "Now, let's fail", PHP_EOL, PHP_EOL;
apcu_store('astring', 'foo');
$ret = apcu_inc('astring', 1, $fail);
var_dump($ret);
var_dump($fail);
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
Let's do something with success
42
43
53
63
bool(true)
Now, let's fail
bool(false)
bool(false)
]]>
</screen>
</example>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><function>apcu_dec</function></member>
</simplelist>
</refsect1>
</refentry>
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