mirror of
https://github.com/sigmasternchen/php-doc-en
synced 2025-03-31 08:18:56 +00:00
af4410a7e1
still using this, after discussion on the phpdoc list. From now on, manual.ced will need to be found at ~/.phpdoc/manual.ced. git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@288721 c90b9560-bf6c-de11-be94-00142212c4b1
125 lines
3.6 KiB
XML
125 lines
3.6 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<phpdoc:varentry xmlns:phpdoc="http://php.net/ns/phpdoc" xml:id="language.variables.superglobals" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" role="noversion">
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<refnamediv>
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<refname>Superglobals</refname>
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<refpurpose>Superglobals are built-in variables that are always available in all scopes</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<para>
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Several predefined variables in PHP are "superglobals", which means they
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are available in all scopes throughout a script. There is no need to do
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<command>global $variable;</command> to access them within functions
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or methods.
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</para>
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<para>
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These superglobal variables are:
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<simplelist>
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<member><varname>$GLOBALS</varname></member>
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<member><varname>$_SERVER</varname></member>
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<member><varname>$_GET</varname></member>
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<member><varname>$_POST</varname></member>
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<member><varname>$_FILES</varname></member>
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<member><varname>$_COOKIE</varname></member>
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<member><varname>$_SESSION</varname></member>
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<member><varname>$_REQUEST</varname></member>
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<member><varname>$_ENV</varname></member>
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</simplelist>
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<para>
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>4.1.0</entry>
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<entry>
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Superglobals were introduced to PHP.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</para>
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</refsect1>
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<refsect1 role="notes">
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&reftitle.notes;
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<note>
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<title>Variable availability</title>
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<para>
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By default, all of the superglobals are available but there are
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directives that affect this availability. For further information, refer
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to the documentation for
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<link linkend="ini.variables-order">variables_order</link>.
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</para>
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</note>
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<note>
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<title>Dealing with register_globals</title>
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<para>
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If the deprecated <link linkend="ini.register-globals">register_globals</link>
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directive is set to <literal>on</literal> then the variables within will
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also be made available in the global scope of the script. For example,
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<varname>$_POST['foo']</varname> would also exist as <varname>$foo</varname>.
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</para>
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<para>
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For related information, see the FAQ titled
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"<link linkend="faq.register-globals">How does register_globals affect me?</link>"
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</para>
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</note>
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<note>
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<title>Variable variables</title>
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<para>
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Superglobals cannot be used as
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<link linkend="language.variables.variable">variable variables</link>
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inside functions or class methods.
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</para>
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</note>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><link linkend="language.variables.scope">variable scope</link></member>
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<member>The <link linkend="ini.variables-order">variables_order</link> directive</member>
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<member><link linkend="book.filter">The filter extension</link></member>
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</simplelist>
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</para>
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</refsect1>
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</phpdoc:varentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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