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

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><H1
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>session_register</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN208579"
></A
><P
>    (PHP 4, PHP 5)</P
>session_register&nbsp;--&nbsp;
     Register one or more global variables with the current session
    </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN208582"
></A
><H2
>Description</H2
>bool <B
CLASS="methodname"
>session_register</B
> ( mixed name [, mixed ...] )<BR
></BR
><P
>&#13;     <B
CLASS="function"
>session_register()</B
> accepts a variable number of
     arguments, any of which can be either a string holding the name of a
     variable or an array consisting of variable names or other arrays. For
     each name, <B
CLASS="function"
>session_register()</B
> registers the global
     variable with that name in the current session.
    </P
><DIV
CLASS="caution"
><P
></P
><TABLE
CLASS="caution"
BORDER="1"
WIDTH="100%"
><TR
><TD
ALIGN="CENTER"
><B
>小心</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
>&#13;      If you want your script to work regardless of <A
HREF="ini.core.html#ini.register-globals"
>register_globals</A
>,
      you need to instead use the 
      <A
HREF="reserved.variables.html#reserved.variables.session"
>$_SESSION</A
> array 
      as <CODE
CLASS="varname"
>$_SESSION</CODE
> entries are automatically
      registered. If your script uses
      <B
CLASS="function"
>session_register()</B
>, it will not work in
      environments where the PHP directive 
      <A
HREF="ini.core.html#ini.register-globals"
>register_globals</A
>
      is disabled.
     </P
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>register_globals 重要说明: </B
>自 PHP 4.2.0 起，PHP 中的选项
<A
HREF="ini.core.html#ini.register-globals"
>register_globals</A
> 的默认值被设为
<SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>off</I
></SPAN
>，并且自 PHP 6.0.0
起会被彻底去除。PHP 社区鼓励大家不要依赖于这个选项，用其它方法替代，例如<A
HREF="language.variables.predefined.html"
>superglobals</A
>。</P
></BLOCKQUOTE
></DIV
><DIV
CLASS="caution"
><P
></P
><TABLE
CLASS="caution"
BORDER="1"
WIDTH="100%"
><TR
><TD
ALIGN="CENTER"
><B
>小心</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
>&#13;      This registers a <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>global</I
></SPAN
> variable. If you
      want to register a session variable from within a function, you
      need to make sure to make it global using the <A
HREF="language.variables.scope.html"
><B
CLASS="command"
>global</B
></A
>
      keyword or the <CODE
CLASS="varname"
>$GLOBALS[]</CODE
> array, or use the
      special session arrays as noted below.
     </P
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="caution"
><P
></P
><TABLE
CLASS="caution"
BORDER="1"
WIDTH="100%"
><TR
><TD
ALIGN="CENTER"
><B
>小心</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
>&#13;      If you are using <CODE
CLASS="varname"
>$_SESSION</CODE
>
      (or <CODE
CLASS="varname"
>$HTTP_SESSION_VARS</CODE
>), do not use
      <B
CLASS="function"
>session_register()</B
>,
      <A
HREF="function.session-is-registered.html"
><B
CLASS="function"
>session_is_registered()</B
></A
>, and
      <A
HREF="function.session-unregister.html"
><B
CLASS="function"
>session_unregister()</B
></A
>.
     </P
></TD
></TR
></TABLE
></DIV
><P
>&#13;     This function returns <TT
CLASS="constant"
><B
>TRUE</B
></TT
> when all of the variables are successfully
     registered with the session.
    </P
><P
>&#13;     If <A
HREF="function.session-start.html"
><B
CLASS="function"
>session_start()</B
></A
> was not called before this function
     is called, an implicit call to <A
HREF="function.session-start.html"
><B
CLASS="function"
>session_start()</B
></A
> with no
     parameters will be made.  <CODE
CLASS="varname"
>$_SESSION</CODE
> does not mimic
     this behavior and requires <A
HREF="function.session-start.html"
><B
CLASS="function"
>session_start()</B
></A
> before use.
    </P
><P
>&#13;     You can also create a session variable by simply setting the
     appropriate member of the <CODE
CLASS="varname"
>$_SESSION</CODE
>
     or <CODE
CLASS="varname"
>$HTTP_SESSION_VARS</CODE
> (PHP &#60; 4.1.0) array.
     <DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN208632"
></A
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">// Use of session_register() is deprecated<br /></font><font color="#0000BB">$barney </font><font color="#007700">= </font><font color="#DD0000">"A big purple dinosaur."</font><font color="#007700">;<br /></font><font color="#0000BB">session_register</font><font color="#007700">(</font><font color="#DD0000">"barney"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">// Use of $_SESSION is preferred, as of PHP 4.1.0<br /></font><font color="#0000BB">$_SESSION</font><font color="#007700">[</font><font color="#DD0000">"zim"</font><font color="#007700">] = </font><font color="#DD0000">"An invader from another planet."</font><font color="#007700">;<br /><br /></font><font color="#FF8000">// The old way was to use $HTTP_SESSION_VARS<br /></font><font color="#0000BB">$HTTP_SESSION_VARS</font><font color="#007700">[</font><font color="#DD0000">"spongebob"</font><font color="#007700">] = </font><font color="#DD0000">"He's got square pants."</font><font color="#007700">;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
></P
></DIV
>
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
      It is currently impossible to register resource variables in a
      session.  For example, you cannot create a connection to a
      database and store the connection id as a session variable and
      expect the connection to still be valid the next time the
      session is restored.  PHP functions that return a resource are
      identified by having a return type of
      <TT
CLASS="literal"
>resource</TT
> in their function definition.  A
      list of functions that return resources are available in the
      <A
HREF="resource.html"
>resource types</A
> appendix.
     </P
><P
>&#13;      If <CODE
CLASS="varname"
>$_SESSION</CODE
> (or
      <CODE
CLASS="varname"
>$HTTP_SESSION_VARS</CODE
> for PHP 4.0.6 or less) is
      used, assign values to
      <CODE
CLASS="varname"
>$_SESSION</CODE
>. For example: $_SESSION['var'] = 'ABC';
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     See also <A
HREF="function.session-is-registered.html"
><B
CLASS="function"
>session_is_registered()</B
></A
>,
     <A
HREF="function.session-unregister.html"
><B
CLASS="function"
>session_unregister()</B
></A
>, and
     <A
HREF="reserved.variables.html#reserved.variables.session"
>$_SESSION</A
>.
    </P
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