/
get-defined-constants.xml
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/
get-defined-constants.xml
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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<!-- EN-Revision: 0e8fa6aa168fe2cb9bc5cae74ed22a52d1df891b Maintainer: daijie Status: ready -->
<!-- CREDITS: Luffy -->
<refentry xml:id="function.get-defined-constants" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>get_defined_constants</refname>
<refpurpose>返回所有常量的关联数组，键是常量名，值是常量值</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>array</type><methodname>get_defined_constants</methodname>
<methodparam choice="opt"><type>bool</type><parameter>categorize</parameter><initializer>&false;</initializer></methodparam>
</methodsynopsis>
<para>
返回当前所有已定义的常量名和值。
这包含 <function>define</function> 函数所创建的，也包含了所有扩展所创建的。
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>categorize</parameter></term>
<listitem>
<para>
让此函数返回一个多维数组，分类为第一维的键名，常量和它们的值位于第二维。
<informalexample>
<programlisting role="php">
<![CDATA[
<?php
define("MY_CONSTANT", 1);
print_r(get_defined_constants(true));
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
Array
(
[Core] => Array
(
[E_ERROR] => 1
[E_WARNING] => 2
[E_PARSE] => 4
[E_NOTICE] => 8
[E_CORE_ERROR] => 16
[E_CORE_WARNING] => 32
[E_COMPILE_ERROR] => 64
[E_COMPILE_WARNING] => 128
[E_USER_ERROR] => 256
[E_USER_WARNING] => 512
[E_USER_NOTICE] => 1024
[E_ALL] => 2047
[TRUE] => 1
)
[pcre] => Array
(
[PREG_PATTERN_ORDER] => 1
[PREG_SET_ORDER] => 2
[PREG_OFFSET_CAPTURE] => 256
[PREG_SPLIT_NO_EMPTY] => 1
[PREG_SPLIT_DELIM_CAPTURE] => 2
[PREG_SPLIT_OFFSET_CAPTURE] => 4
[PREG_GREP_INVERT] => 1
)
[user] => Array
(
[MY_CONSTANT] => 1
)
)
]]>
</screen>
</informalexample>
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
返回的数组为 常量名 => 常量值，也可以按注册变量的扩展名称来分组。
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>get_defined_constants</function> 示例</title>
<programlisting role="php">
<![CDATA[
<?php
print_r(get_defined_constants());
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
Array
(
[E_ERROR] => 1
[E_WARNING] => 2
[E_PARSE] => 4
[E_NOTICE] => 8
[E_CORE_ERROR] => 16
[E_CORE_WARNING] => 32
[E_COMPILE_ERROR] => 64
[E_COMPILE_WARNING] => 128
[E_USER_ERROR] => 256
[E_USER_WARNING] => 512
[E_USER_NOTICE] => 1024
[E_ALL] => 2047
[TRUE] => 1
)
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>defined</function></member>
<member><function>constant</function></member>
<member><function>get_loaded_extensions</function></member>
<member><function>get_defined_functions</function></member>
<member><function>get_defined_vars</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:"~/.phpdoc/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
-->