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decompress.xml
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decompress.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="phar.decompress" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>Phar::decompress</refname>
<refpurpose>Decompresses the entire Phar archive</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis role="Phar">
<modifier>public</modifier> <type class="union"><type>Phar</type><type>null</type></type><methodname>Phar::decompress</methodname>
<methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>extension</parameter><initializer>&null;</initializer></methodparam>
</methodsynopsis>
&phar.write;
<para>
For tar-based and phar-based phar archives, this method decompresses the entire archive.
</para>
<para>
For Zip-based phar archives, this method fails with an exception.
The <link linkend="ref.zlib">zlib</link> extension must be enabled to decompress
an archive compressed with gzip compression, and the
<link linkend="ref.bzip2">bzip2</link> extension must be
enabled in order to decompress an archive compressed with bzip2 compression.
As with all functionality that modifies the contents of a phar, the
<link linkend="ini.phar.readonly">phar.readonly</link> INI variable must be off
in order to succeed.
</para>
<para>
In addition, this method automatically changes the file extension of the archive,
<literal>.phar</literal>
by default for phar archives, or <literal>.phar.tar</literal> for tar-based phar archives.
Alternatively, a file extension may be specified with the second
parameter.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>extension</parameter></term>
<listitem>
<para>
For decompressing, the default file extensions
are <literal>.phar</literal> and <literal>.phar.tar</literal>.
Use this parameter to specify another file extension. Be aware
that all executable phar archives must contain <literal>.phar</literal>
in their filename.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
A <classname>Phar</classname> object is returned on success, and &null; on failure.
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
<para>
Throws <classname>BadMethodCallException</classname> if
the <link linkend="ini.phar.readonly">phar.readonly</link>
INI variable is on, the <link linkend="ref.zlib">zlib</link>
extension is not available, or the <link linkend="ref.bzip2">bzip2</link> extension
is not enabled.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.0.0</entry>
<entry>
<parameter>extension</parameter> is now nullable.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>A <function>Phar::decompress</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$p = new Phar('/path/to/my.phar', 0, 'my.phar.gz');
$p['myfile.txt'] = 'hi';
$p['myfile2.txt'] = 'hi';
$p3 = $p2->decompress(); // creates /path/to/my.phar
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>PharFileInfo::getCompressedSize</function></member>
<member><function>PharFileInfo::isCompressed</function></member>
<member><function>PharFileInfo::compress</function></member>
<member><function>PharFileInfo::decompress</function></member>
<member><function>PharData::compress</function></member>
<member><function>Phar::canCompress</function></member>
<member><function>Phar::isCompressed</function></member>
<member><function>Phar::compress</function></member>
<member><function>Phar::getSupportedCompression</function></member>
<member><function>Phar::compressFiles</function></member>
<member><function>Phar::decompressFiles</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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