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

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

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>session_id</H1
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></A
><P
>    (PHP 4, PHP 5)</P
>session_id&nbsp;--&nbsp;Get and/or set the current session id</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN208394"
></A
><H2
>说明</H2
>string <B
CLASS="methodname"
>session_id</B
> ( [string id] )<BR
></BR
><P
>&#13;   <B
CLASS="function"
>session_id()</B
> is used to get or set the session id for
   the current session.
  </P
><P
>&#13;   The constant <SPAN
CLASS="systemitem"
>SID</SPAN
> can also be used to
   retrieve the current name and session id as a string suitable for
   adding to URLs. See also <A
HREF="ref.session.html"
>Session
   handling</A
>.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN208407"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>id</CODE
></DT
><DD
><P
>&#13;        If <CODE
CLASS="parameter"
>id</CODE
> is specified, it will replace the current
        session id. <B
CLASS="function"
>session_id()</B
> needs to be called before
        <A
HREF="function.session-start.html"
><B
CLASS="function"
>session_start()</B
></A
> for that purpose. Depending on the
        session handler, not all characters are allowed within the session id.
        For example, the file session handler only allows characters in the
        range <TT
CLASS="literal"
>a-z, A-Z and 0-9</TT
>!
       </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
         When using session cookies, specifying an <CODE
CLASS="parameter"
>id</CODE
>
         for <B
CLASS="function"
>session_id()</B
> will always send a new cookie
         when <A
HREF="function.session-start.html"
><B
CLASS="function"
>session_start()</B
></A
> is called, regardless if the
         current session id is identical to the one being set.
        </P
></BLOCKQUOTE
></DIV
></DD
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN208425"
></A
><H2
>返回值</H2
><P
>&#13;   <B
CLASS="function"
>session_id()</B
> returns the session id for the current
   session or the empty string (<TT
CLASS="literal"
>""</TT
>) if there is no current
   session (no current session id exists).
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN208430"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><A
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><B
CLASS="function"
>session_regenerate_id()</B
></A
></TD
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><TD
><A
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><B
CLASS="function"
>session_start()</B
></A
></TD
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><TD
><A
HREF="function.session-set-save-handler.html"
><B
CLASS="function"
>session_set_save_handler()</B
></A
></TD
></TR
><TR
><TD
>&#13;     <A
HREF="ref.session.html#ini.session.save-handler"
>session.save_handler</A
>
    </TD
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