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<refentry xml:id="phardata.decompress" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>PharData::decompress</refname>
  <refpurpose>Decompresses the entire Phar archive</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis role="PharData">
   <modifier>public</modifier> <type class="union"><type>PharData</type><type>null</type></type><methodname>PharData::decompress</methodname>
   <methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>extension</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>

  <para>
   For tar-based archives, this method decompresses the entire archive.
  </para>
  <para>
   For Zip-based 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.
  </para>
  <para>
   In addition, this method automatically renames the file extension of the archive,
   <literal>.tar</literal> by default.
   Alternatively, a file extension may be specified with the <parameter>extension</parameter>
   parameter.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>extension</parameter></term>
     <listitem>
      <para>
       For decompressing, the default file extension
       is <literal>.tar</literal>.
       Use this parameter to specify another file extension. Be aware that only
       executable archives can contain <literal>.phar</literal> in their filename.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   A <classname>PharData</classname> object is returned on success,
   or &null; on failure.
  </para>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
  <para>
   Throws <classname>BadMethodCallException</classname> if
   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>PharData::decompress</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
$p = new PharData('/path/to/my.tar.gz');
$p->decompress(); // creates /path/to/my.tar
?>
]]>
    </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>PharData::compress</function></member>
    <member><function>Phar::getSupportedCompression</function></member>
    <member><function>PharData::compressFiles</function></member>
    <member><function>PharData::decompressFiles</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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