Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>apc_define_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="APC 可选 PHP 缓存"
HREF="ref.apc.html"><LINK
REL="PREVIOUS"
TITLE="apc_clear_cache"
HREF="function.apc-clear-cache.html"><LINK
REL="NEXT"
TITLE="apc_delete"
HREF="function.apc-delete.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.apc-clear-cache.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.apc-delete.html"
ACCESSKEY="N"
>下一页</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="function.apc-define-constants"
></A
>apc_define_constants</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN9337"
></A
><P
>    (PECL)</P
>apc_define_constants&nbsp;--&nbsp;
   Defines a set of constants for retrieval and mass-definition 
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN9340"
></A
><H2
>说明</H2
>bool <B
CLASS="methodname"
>apc_define_constants</B
> ( string key, array constants [, bool case_sensitive] )<BR
></BR
><P
>&#13;   <A
HREF="function.define.html"
><B
CLASS="function"
>define()</B
></A
> is notoriously slow. Since the main benefit of
   APC is to increase the performance of scripts/applications, this mechanism
   is provided to streamline the process of mass constant definition. However,
   this function does not perform as well as anticipated.
  </P
><P
>&#13;   For a better-performing solution, try the
   <A
HREF="http://pecl.php.net/package/hidef"
TARGET="_top"
>hidef</A
> extension from PECL.
  </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
    To remove a set of stored constants (without clearing the entire cache), an
    empty array may be passed as the <CODE
CLASS="parameter"
>constants</CODE
>
    parameter, effectively clearing the stored value(s).
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN9361"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>key</CODE
></DT
><DD
><P
>&#13;       The <CODE
CLASS="parameter"
>key</CODE
> serves as the name of the constant set
       being stored. This <CODE
CLASS="parameter"
>key</CODE
> is used to retrieve the
       stored constants in <A
HREF="function.apc-load-constants.html"
><B
CLASS="function"
>apc_load_constants()</B
></A
>.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>constants</CODE
></DT
><DD
><P
>&#13;       An associative array of <TT
CLASS="literal"
>constant_name =&#62; value</TT
>
       pairs. The <TT
CLASS="literal"
>constant_name</TT
> must follow the normal
       <A
HREF="language.constants.html"
>constant</A
> naming rules.
       <TT
CLASS="literal"
>value</TT
> must evaluate to a scalar value.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>case_sensitive</CODE
></DT
><DD
><P
>&#13;       The default behaviour for constants is to be declared case-sensitive;
       i.e. <TT
CLASS="literal"
>CONSTANT</TT
> and <TT
CLASS="literal"
>Constant</TT
>
       represent different values. If this parameter evaluates to <TT
CLASS="constant"
><B
>FALSE</B
></TT
> the
       constants will be declared as case-insensitive symbols.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN9390"
></A
><H2
>返回值</H2
><P
>&#13;   如果成功则返回 <TT
CLASS="constant"
><B
>TRUE</B
></TT
>，失败则返回 <TT
CLASS="constant"
><B
>FALSE</B
></TT
>。
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN9395"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN9398"
></A
><P
><B
>例 1. <B
CLASS="function"
>apc_define_constants()</B
> example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$constants </font><font color="#007700">= array(<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'ONE'&nbsp;&nbsp;&nbsp;</font><font color="#007700">=&gt; </font><font color="#0000BB">1</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'TWO'&nbsp;&nbsp;&nbsp;</font><font color="#007700">=&gt; </font><font color="#0000BB">2</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'THREE' </font><font color="#007700">=&gt; </font><font color="#0000BB">3</font><font color="#007700">,<br />);<br /></font><font color="#0000BB">apc_define_constants</font><font color="#007700">(</font><font color="#DD0000">'numbers'</font><font color="#007700">, </font><font color="#0000BB">$constants</font><font color="#007700">);<br />echo </font><font color="#0000BB">ONE</font><font color="#007700">, </font><font color="#0000BB">TWO</font><font color="#007700">, </font><font color="#0000BB">THREE</font><font color="#007700">;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>上例将输出：</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>123</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN9404"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.apc-load-constants.html"
><B
CLASS="function"
>apc_load_constants()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.define.html"
><B
CLASS="function"
>define()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.constant.html"
><B
CLASS="function"
>constant()</B
></A
></TD
></TR
><TR
><TD
>&#13;     Or <A
HREF="language.constants.html"
>the PHP constants reference</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.apc-clear-cache.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.apc-delete.html"
ACCESSKEY="N"
>下一页</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>apc_clear_cache</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ref.apc.html"
ACCESSKEY="U"
>上一级</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>apc_delete</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>