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

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

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>DBM Functions [deprecated]</TITLE
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>XXVI. DBM Functions [deprecated]</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN34458"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="dbm.intro"
>简介</A
></H1
><P
>&#13;     These functions allow you to store records stored in a dbm-style
     database. This type of database (supported by the Berkeley DB,
     <A
HREF="ftp://ftp.gnu.org/pub/gnu/gdbm/"
TARGET="_top"
>GDBM</A
>, and some system libraries,
     as well as a built-in flatfile library) stores key/value pairs
     (as opposed to the full-blown records supported by relational
     databases).
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
      DBM support is deprecated and you are encouraged to use the
      <A
HREF="ref.dba.html"
>Database (dbm-style) abstraction layer functions</A
>
      instead.
     </P
></BLOCKQUOTE
></DIV
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
      This extension has been removed from PHP and is no longer available as
      of PHP 5.0.0. 
     </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="dbm.required"
>需求</A
></H1
><P
>&#13;     To use this functions you have to compile PHP with support for an
     underlying database. See the 
     <A
HREF="ref.dba.html#dba.requirements"
>list</A
> of supported Databases.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="dbm.installation"
>安装</A
></H1
><P
>&#13;  In order to use these functions, you must compile PHP with dbm support
  by using the <CODE
CLASS="option"
>--with-db</CODE
> option. In
  addition you must ensure <A
HREF="ref.dba.html#dba.installation"
>support</A
>
  for an underlying database or you can use some system libraries.
 </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="dbm.runtime"
>运行时配置</A
></H1
><P
>本扩展模块在 <TT
CLASS="filename"
>php.ini</TT
> 中未定义任何配置选项。</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="dbm.resources"
>资源类型</A
></H1
><P
>&#13;     The function <A
HREF="function.dbmopen.html"
><B
CLASS="function"
>dbmopen()</B
></A
> returns an database identifier
     which is used by the other dbm-functions.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="dbm.constants"
>预定义常量</A
></H1
><P
>本扩展模块未定义任何常量。</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="dbm.examples"
>范例</A
></H1
><P
>&#13;    <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN34491"
></A
><P
><B
>例 1. DBM example</B
></P
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CELLPADDING="5"
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$dbm </font><font color="#007700">= </font><font color="#0000BB">dbmopen</font><font color="#007700">(</font><font color="#DD0000">"lastseen"</font><font color="#007700">, </font><font color="#DD0000">"w"</font><font color="#007700">);<br />if (</font><font color="#0000BB">dbmexists</font><font color="#007700">(</font><font color="#0000BB">$dbm</font><font color="#007700">, </font><font color="#0000BB">$userid</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$last_seen </font><font color="#007700">= </font><font color="#0000BB">dbmfetch</font><font color="#007700">(</font><font color="#0000BB">$dbm</font><font color="#007700">, </font><font color="#0000BB">$userid</font><font color="#007700">);<br />} else {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">dbminsert</font><font color="#007700">(</font><font color="#0000BB">$dbm</font><font color="#007700">, </font><font color="#0000BB">$userid</font><font color="#007700">, </font><font color="#0000BB">time</font><font color="#007700">());<br />}<br /></font><font color="#0000BB">do_stuff</font><font color="#007700">();<br /></font><font color="#0000BB">dbmreplace</font><font color="#007700">(</font><font color="#0000BB">$dbm</font><font color="#007700">, </font><font color="#0000BB">$userid</font><font color="#007700">, </font><font color="#0000BB">time</font><font color="#007700">());<br /></font><font color="#0000BB">dbmclose</font><font color="#007700">(</font><font color="#0000BB">$dbm</font><font color="#007700">);<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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></DIV
></TD
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>
   </P
></DIV
></DIV
><DIV
CLASS="TOC"
><DL
><DT
><B
>目录</B
></DT
><DT
><A
HREF="function.dblist.html"
>dblist</A
>&nbsp;--&nbsp;Describes the DBM-compatible library being used</DT
><DT
><A
HREF="function.dbmclose.html"
>dbmclose</A
>&nbsp;--&nbsp;Closes a dbm database</DT
><DT
><A
HREF="function.dbmdelete.html"
>dbmdelete</A
>&nbsp;--&nbsp;Deletes the value for a key from a DBM database</DT
><DT
><A
HREF="function.dbmexists.html"
>dbmexists</A
>&nbsp;--&nbsp;Tells if a value exists for a key in a DBM database</DT
><DT
><A
HREF="function.dbmfetch.html"
>dbmfetch</A
>&nbsp;--&nbsp;Fetches a value for a key from a DBM database</DT
><DT
><A
HREF="function.dbmfirstkey.html"
>dbmfirstkey</A
>&nbsp;--&nbsp;Retrieves the first key from a DBM database</DT
><DT
><A
HREF="function.dbminsert.html"
>dbminsert</A
>&nbsp;--&nbsp;Inserts a value for a key in a DBM database</DT
><DT
><A
HREF="function.dbmnextkey.html"
>dbmnextkey</A
>&nbsp;--&nbsp;</DT
><DT
><A
HREF="function.dbmopen.html"
>dbmopen</A
>&nbsp;--&nbsp;Opens a DBM database</DT
><DT
><A
HREF="function.dbmreplace.html"
>dbmreplace</A
>&nbsp;--&nbsp;Replaces the value for a key in a DBM database</DT
></DL
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