php-doc-en/reference/info/functions/phpversion.xml

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.9 $ -->
<refentry xml:id="function.phpversion" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>phpversion</refname>
  <refpurpose>Gets the current PHP version</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>string</type><methodname>phpversion</methodname>
   <methodparam choice="opt"><type>string</type><parameter>extension</parameter></methodparam>
  </methodsynopsis>
  <para>
   Returns a string containing the version of the currently running PHP
   parser or extension.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>extension</parameter></term>
     <listitem>
      <para>
       An optional extension name.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   If the optional <parameter>extension</parameter> parameter is
   specified, <function>phpversion</function> returns the version of that
   extension, or &false; if there is no version information associated or
   the extension isn't enabled.
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>phpversion</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php
// prints e.g. 'Current PHP version: 4.1.1'
echo 'Current PHP version: ' . phpversion();

// prints e.g. '2.0' or nothing if the extension isn't enabled
echo phpversion('tidy');
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="notes">
  &reftitle.notes;
  <note>
   <para>
    This information is also available in the predefined constant
    <constant>PHP_VERSION</constant>.
   </para>
  </note>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>version_compare</function></member>
    <member><function>phpinfo</function></member>
    <member><function>phpcredits</function></member>
    <member><function>php_logo_guid</function></member>
    <member><function>zend_version</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
indent-tabs-mode:nil
sgml-parent-document:nil
sgml-default-dtd-file:"../../../../manual.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:nil
sgml-local-ecat-files:nil
End:
vim600: syn=xml fen fdm=syntax fdl=2 si
vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->