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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.reset" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>reset</refname>
<refpurpose>Set the internal pointer of an array to its first element</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>mixed</type><methodname>reset</methodname>
<methodparam><type class="union"><type>array</type><type>object</type></type><parameter role="reference">array</parameter></methodparam>
</methodsynopsis>
<para>
<function>reset</function> rewinds <parameter>array</parameter>'s internal
pointer to the first element and returns the value of the first array
element.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>array</parameter></term>
<listitem>
<para>
The input array.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the value of the first array element, or &false; if the array is
empty.
</para>
&return.falseproblem;
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
&standard.changelog.calling-on-objects;
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>reset</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$array = array('step one', 'step two', 'step three', 'step four');
// by default, the pointer is on the first element
echo current($array) . "<br />\n"; // "step one"
// skip two steps
next($array);
next($array);
echo current($array) . "<br />\n"; // "step three"
// reset pointer, start again on step one
reset($array);
echo current($array) . "<br />\n"; // "step one"
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<simpara>
The return value for an empty array is indistinguishable from
the return value in case of an array which has a <type>bool</type> &false;
first element. To properly check the value of the first element of an array
which may contain &false; elements, first check the <function>count</function>
of the array, or check that <function>key</function> is not
&null;, after calling <function>reset</function>.
</simpara>
</note>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>current</function></member>
<member><function>each</function></member>
<member><function>end</function></member>
<member><function>next</function></member>
<member><function>prev</function></member>
<member><function>array_key_first</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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