<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >get_defined_constants</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="PHP Options&Information" HREF="ref.info.html"><LINK REL="PREVIOUS" TITLE="get_current_user" HREF="function.get-current-user.html"><LINK REL="NEXT" TITLE="get_extension_funcs" HREF="function.get-extension-funcs.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.get-current-user.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.get-extension-funcs.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.get-defined-constants" ></A >get_defined_constants</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN180849" ></A ><P > (PHP 4 >= 4.1.0, PHP 5)</P >get_defined_constants -- Returns an associative array with the names of all the constants and their values</DIV ><DIV CLASS="refsect1" ><A NAME="AEN180852" ></A ><H2 >说明</H2 >array <B CLASS="methodname" >get_defined_constants</B > ( [mixed categorize] )<BR ></BR ><P > Returns the names and values of all the constants currently defined. This includes those created by extensions as well as those created with the <A HREF="function.define.html" ><B CLASS="function" >define()</B ></A > function. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN180862" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >categorize</CODE ></DT ><DD ><P > May be passed, causing this function to return a multi-dimensional array with categories in the keys of the first dimension and constants and their values in the second dimension. <DIV CLASS="informalexample" ><P ></P ><A NAME="AEN180871" ></A ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />define</font><font color="#007700">(</font><font color="#DD0000">"MY_CONSTANT"</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">);<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">get_defined_constants</font><font color="#007700">(</font><font color="#0000BB">true</font><font color="#007700">));<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P >上例的输出类似于:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Array ( [internal] => 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 ) )</PRE ></TD ></TR ></TABLE ><P ></P ></DIV > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > The value of the <CODE CLASS="parameter" >categorize</CODE > parameter is irrelevant, only its presence is considered. </P ></BLOCKQUOTE ></DIV ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN180878" ></A ><H2 >返回值</H2 ><P > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN180881" ></A ><H2 >更新日志</H2 ><P > <DIV CLASS="informaltable" ><P ></P ><A NAME="AEN180884" ></A ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><THEAD ><TR ><TH >版本</TH ><TH >说明</TH ></TR ></THEAD ><TBODY ><TR ><TD >5.0.0</TD ><TD > The <CODE CLASS="parameter" >categorize</CODE > parameter was added. </TD ></TR ></TBODY ></TABLE ><P ></P ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN180895" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN180898" ></A ><P ><B >例 1. <B CLASS="function" >get_defined_constants()</B > Example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />print_r</font><font color="#007700">(</font><font color="#0000BB">get_defined_constants</font><font color="#007700">());<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P >上例的输出类似于:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >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 )</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN180904" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.defined.html" ><B CLASS="function" >defined()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.get-loaded-extensions.html" ><B CLASS="function" >get_loaded_extensions()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.get-defined-functions.html" ><B CLASS="function" >get_defined_functions()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.get-defined-vars.html" ><B CLASS="function" >get_defined_vars()</B ></A ></TD ></TR ></TBODY ></TABLE ><P ></P > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.get-current-user.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.get-extension-funcs.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >get_current_user</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.info.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >get_extension_funcs</TD ></TR ></TABLE ></DIV ></BODY ></HTML >