php-doc-en/reference/phar/Phar/decompress.xml

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

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <modifier>public</modifier> <type>object</type><methodname>Phar::decompress</methodname>
   <methodparam choice="opt"><type>string</type><parameter>extension</parameter></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.
  </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="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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