mirror of
https://github.com/sigmasternchen/php-doc-en
synced 2025-03-17 17:38:54 +00:00
19a7b598e9
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@277637 c90b9560-bf6c-de11-be94-00142212c4b1
430 lines
11 KiB
XML
Executable file
430 lines
11 KiB
XML
Executable file
<?xml version="1.0" encoding="iso-8859-1"?>
|
|
<!-- $Revision: 1.82 $ -->
|
|
|
|
<appendix xml:id="reserved" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
|
|
<title>List of Reserved Words</title>
|
|
<para>
|
|
The following is a listing of predefined identifiers in PHP. None
|
|
of the identifiers listed here should be used as identifiers in any of
|
|
your scripts. These lists include keywords and predefined variable,
|
|
constant, and class names. These lists are neither exhaustive or
|
|
complete.
|
|
</para>
|
|
|
|
<sect1 xml:id="reserved.keywords">
|
|
<title>List of Keywords</title>
|
|
<simpara>
|
|
These words have special meaning in PHP. Some of them represent things
|
|
which look like functions, some look like constants, and so on--but
|
|
they're not, really: they are language constructs. You cannot use any
|
|
of the following words as constants, class names, function or method names.
|
|
Using them as variable names is generally OK, but could lead to confusion.
|
|
</simpara>
|
|
|
|
<table>
|
|
<title>PHP Keywords</title>
|
|
<tgroup cols="5">
|
|
<tbody>
|
|
<row>
|
|
<entry>
|
|
<link linkend="language.oop5.abstract">abstract</link> (as of PHP 5)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.operators.logical">and</link>
|
|
</entry>
|
|
<entry>
|
|
<function>array</function>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.foreach">as</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.break">break</link>
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="control-structures.switch">case</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.exceptions">catch</link> (as of PHP 5)
|
|
</entry>
|
|
<entry>
|
|
cfunction (PHP 4 only)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="keyword.class">class</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.oop5.cloning">clone</link> (as of PHP 5)
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="language.oop5.constants">const</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.continue">continue</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.declare">declare</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.switch">default</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.do.while">do</link>
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="control-structures.else">else</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.elseif">elseif</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.declare">enddeclare</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.alternative-syntax">endfor</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.alternative-syntax">endforeach</link>
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="control-structures.alternative-syntax">endif</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.alternative-syntax">endswitch</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.alternative-syntax">endwhile</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="keyword.class">extends</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.oop5.final">final</link> (as of PHP 5)
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="control-structures.for">for</link>
|
|
</entry>
|
|
<entry>
|
|
&foreach;
|
|
</entry>
|
|
<entry>
|
|
<link linkend="functions.user-defined">function</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.variables.scope">global</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.goto">goto</link> (as of PHP 5.3)
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="control-structures.if">if</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.oop5.interfaces">implements</link> (as of PHP 5)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.oop5.interfaces">interface</link> (as of PHP 5)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.operators.type">instanceof</link> (as of PHP 5)
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="language.namespaces">namespace</link> (as of PHP 5.3)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="keyword.class">new</link>
|
|
</entry>
|
|
<entry>
|
|
old_function (PHP 4 only)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.operators.logical">or</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.oop5.visibility">private</link> (as of PHP 5)
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="language.oop5.visibility">protected</link> (as of PHP 5)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.oop5.visibility">public</link> (as of PHP 5)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.variables.scope">static</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.switch">switch</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.exceptions">throw</link> (as of PHP 5)
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="language.exceptions">try</link> (as of PHP 5)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.namespaces">use</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="keyword.class">var</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="control-structures.while">while</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.operators.logical">xor</link>
|
|
</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
<table>
|
|
<title>Compile-time constants</title>
|
|
<tgroup cols="5">
|
|
<tbody>
|
|
<row>
|
|
<entry>
|
|
<link linkend="language.constants.predefined">__CLASS__</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.constants.predefined">__DIR__</link> (as of PHP 5.3)
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.constants.predefined">__FILE__</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.constants.predefined">__FUNCTION__</link>
|
|
</entry>
|
|
<entry>
|
|
<link linkend="language.constants.predefined">__METHOD__</link>
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<link linkend="language.namespaces">__NAMESPACE__</link> (as of PHP 5.3)
|
|
</entry>
|
|
<entry>
|
|
</entry>
|
|
<entry>
|
|
</entry>
|
|
<entry>
|
|
</entry>
|
|
<entry>
|
|
</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
<table>
|
|
<title>Language constructs</title>
|
|
<tgroup cols="5">
|
|
<tbody>
|
|
<row>
|
|
<entry>
|
|
<function>die</function>
|
|
</entry>
|
|
<entry>
|
|
<function>echo</function>
|
|
</entry>
|
|
<entry>
|
|
<function>empty</function>
|
|
</entry>
|
|
<entry>
|
|
<function>exit</function>
|
|
</entry>
|
|
<entry>
|
|
<function>eval</function>
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<function>include</function>
|
|
</entry>
|
|
<entry>
|
|
<function>include_once</function>
|
|
</entry>
|
|
<entry>
|
|
<function>isset</function>
|
|
</entry>
|
|
<entry>
|
|
<function>list</function>
|
|
</entry>
|
|
<entry>
|
|
<function>require</function>
|
|
</entry>
|
|
</row>
|
|
<row>
|
|
<entry>
|
|
<function>require_once</function>
|
|
</entry>
|
|
<entry>
|
|
<function>return</function>
|
|
</entry>
|
|
<entry>
|
|
<function>print</function>
|
|
</entry>
|
|
<entry>
|
|
<function>unset</function>
|
|
</entry>
|
|
<entry>
|
|
</entry>
|
|
</row>
|
|
</tbody>
|
|
</tgroup>
|
|
</table>
|
|
</sect1>
|
|
|
|
<sect1 xml:id="reserved.classes">
|
|
<title>Predefined Classes</title>
|
|
<para>
|
|
This section lists standard predefined classes. Miscellaneous extensions
|
|
define other classes which are described in their reference.
|
|
</para>
|
|
|
|
<sect2 xml:id="reserved.classes.standard">
|
|
<title>Standard Defined Classes</title>
|
|
|
|
<simpara>
|
|
These classes are defined in the standard set of functions included
|
|
in the PHP build.
|
|
</simpara>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><classname>Directory</classname></term>
|
|
<listitem>
|
|
<simpara>
|
|
The class from which <link linkend="class.dir">dir</link> is instantiated.
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><classname>stdClass</classname></term>
|
|
<listitem>
|
|
<simpara>
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><classname>__PHP_Incomplete_Class</classname></term>
|
|
<listitem>
|
|
<simpara>
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</sect2>
|
|
|
|
<sect2 xml:id="reserved.classes.php5">
|
|
<title>Predefined classes as of PHP 5</title>
|
|
|
|
<simpara>
|
|
These additional predefined classes were introduced in
|
|
PHP 5.0.0.
|
|
</simpara>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><classname>exception</classname></term>
|
|
<listitem>
|
|
<simpara>
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><classname>php_user_filter</classname></term>
|
|
<listitem>
|
|
<simpara>
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</sect2>
|
|
|
|
<sect2 xml:id="reserved.classes.closure">
|
|
<title>Closure</title>
|
|
|
|
<simpara>
|
|
The predefined final class <classname>Closure</classname> was introduced
|
|
in PHP 5.3.0. It is used for internal implementation of <link
|
|
linkend="functions.anonymous">anonymous functions</link>.
|
|
</simpara>
|
|
<simpara>
|
|
The class has a constructor forbiding the manual creation of the object
|
|
(issues <constant>E_RECOVERABLE_ERROR</constant>) and the
|
|
<literal>__invoke</literal> method with the <link
|
|
linkend="language.oop5.magic.invoke">calling magic</link>.
|
|
</simpara>
|
|
|
|
</sect2>
|
|
|
|
|
|
<sect2 xml:id="reserved.classes.special">
|
|
<title>Special classes</title>
|
|
|
|
<simpara>
|
|
Following identifiers may not be used as a class name as they have
|
|
special purpose.
|
|
</simpara>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><classname>self</classname></term>
|
|
<listitem>
|
|
<simpara>
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><classname>parent</classname></term>
|
|
<listitem>
|
|
<simpara>
|
|
</simpara>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</sect2>
|
|
|
|
</sect1>
|
|
|
|
&appendices.reserved.constants;
|
|
|
|
</appendix>
|
|
|
|
<!-- 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
|
|
-->
|