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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="phar.offsetexists">
<refnamediv>
<refname>Phar::offsetExists</refname>
<refpurpose>determines whether a file exists in the phar</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>Phar::offsetExists</methodname>
<methodparam><type>string</type><parameter>offset</parameter></methodparam>
</methodsynopsis>
<para>
This is an implementation of the <interfacename>ArrayAccess</interfacename> interface allowing
direct manipulation of the contents of a Phar archive using
array access brackets.
</para>
<para>
offsetExists() is called whenever <function>isset</function> is called.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>offset</parameter></term>
<listitem>
<para>
The filename (relative path) to look for in a Phar.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns &true; if the file exists within the phar, or &false; if not.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>A <function>Phar::offsetExists</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$p = new Phar(dirname(__FILE__) . '/my.phar', 0, 'my.phar');
$p['firstfile.txt'] = 'first file';
$p['secondfile.txt'] = 'second file';
// the next set of lines call offsetExists() indirectly
var_dump(isset($p['firstfile.txt']));
var_dump(isset($p['nothere.txt']));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
bool(true)
bool(false)
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>Phar::offsetGet</function></member>
<member><function>Phar::offsetSet</function></member>
<member><function>Phar::offsetUnset</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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