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

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>maxdb_data_seek</TITLE
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><H1
><A
NAME="function.maxdb-data-seek"
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>maxdb_data_seek</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN110209"
></A
><P
>    (PECL)</P
>maxdb_data_seek<P
>    (no version information, might be only in CVS)</P
>result-&#62;data_seek&nbsp;--&nbsp;Adjusts the result pointer to an arbitary row in the result</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN110213"
></A
><H2
>Description</H2
><P
>Procedural style:</P
>bool <B
CLASS="methodname"
>maxdb_data_seek</B
> ( resource result, int offset )<BR
></BR
><P
>Object oriented style (method):</P
>class <B
CLASS="classname"
>result</B
> { <BR
></BR
>bool <B
CLASS="methodname"
>data_seek</B
> ( int offset )<BR
></BR
>}<P
>&#13;   The <B
CLASS="function"
>maxdb_data_seek()</B
> function seeks to an arbitrary result pointer
   specified by the <CODE
CLASS="parameter"
>offset</CODE
> in the result set represented by
   <CODE
CLASS="parameter"
>result</CODE
>. The <CODE
CLASS="parameter"
>offset</CODE
> parameter must be between
   zero and the total number of rows minus one (0..<A
HREF="function.maxdb-num-rows.html"
><B
CLASS="function"
>maxdb_num_rows()</B
></A
> - 1).
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN110241"
></A
><H2
>Return values</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="AEN110246"
></A
><H2
>See also</H2
><P
>&#13;   <A
HREF="function.maxdb-store-result.html"
><B
CLASS="function"
>maxdb_store_result()</B
></A
>,
   <A
HREF="function.maxdb-fetch-row.html"
><B
CLASS="function"
>maxdb_fetch_row()</B
></A
>,
   <A
HREF="function.maxdb-num-rows.html"
><B
CLASS="function"
>maxdb_num_rows()</B
></A
>.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN110252"
></A
><H2
>Example</H2
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN110254"
></A
><P
><B
>例 1. Object oriented style</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">/* Open a connection */<br /></font><font color="#0000BB">$maxdb </font><font color="#007700">= new </font><font color="#0000BB">maxdb</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"MONA"</font><font color="#007700">, </font><font color="#DD0000">"RED"</font><font color="#007700">, </font><font color="#DD0000">"DEMODB"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">maxdb_connect_errno</font><font color="#007700">()) {<br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">maxdb_connect_error</font><font color="#007700">());<br />&nbsp;&nbsp;&nbsp;exit();<br />}<br /><br /></font><font color="#0000BB">$query </font><font color="#007700">= </font><font color="#DD0000">"SELECT name, state FROM hotel.city ORDER BY name"</font><font color="#007700">;<br />if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$maxdb</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">( </font><font color="#0000BB">$query</font><font color="#007700">)) {<br /><br />&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* seek to row no. 10 */<br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">data_seek</font><font color="#007700">(</font><font color="#0000BB">10</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* fetch row */<br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$row </font><font color="#007700">= </font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">fetch_row</font><font color="#007700">();<br /><br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf </font><font color="#007700">(</font><font color="#DD0000">"City: %s&nbsp;&nbsp;State: %s\n"</font><font color="#007700">, </font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#0000BB">0</font><font color="#007700">], </font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#0000BB">1</font><font color="#007700">]);<br /><br />&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* free result set*/<br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">close</font><font color="#007700">();<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">$maxdb</font><font color="#007700">-&gt;</font><font color="#0000BB">close</font><font color="#007700">();<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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></TABLE
></DIV
></TD
></TR
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><TABLE
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BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN110257"
></A
><P
><B
>例 2. Procedural style</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">maxdb_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"MONA"</font><font color="#007700">, </font><font color="#DD0000">"RED"</font><font color="#007700">, </font><font color="#DD0000">"DEMODB"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (!</font><font color="#0000BB">$link</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">maxdb_connect_error</font><font color="#007700">());<br />&nbsp;&nbsp;&nbsp;exit();<br />}<br /><br /></font><font color="#0000BB">$query </font><font color="#007700">= </font><font color="#DD0000">"SELECT name, state FROM hotel.city ORDER BY name"</font><font color="#007700">;<br /><br />if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">maxdb_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#0000BB">$query</font><font color="#007700">)) {<br /><br />&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* seek to row no. 400 */<br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">maxdb_data_seek</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">10</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* fetch row */<br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$row </font><font color="#007700">= </font><font color="#0000BB">maxdb_fetch_row</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf </font><font color="#007700">(</font><font color="#DD0000">"City: %s&nbsp;&nbsp;State: %s\n"</font><font color="#007700">, </font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#0000BB">0</font><font color="#007700">], </font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#0000BB">1</font><font color="#007700">]);<br /><br />&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* free result set*/<br />&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">maxdb_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">maxdb_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
><P
>&#13;   The above examples would produce the following output:
  </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>City: Irvine  State: CA</PRE
></TD
></TR
></TABLE
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><HR
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WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
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><TD
WIDTH="33%"
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VALIGN="top"
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HREF="function.maxdb-connect.html"
ACCESSKEY="P"
>上一页</A
></TD
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WIDTH="34%"
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><A
HREF="index.html"
ACCESSKEY="H"
>起始页</A
></TD
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WIDTH="33%"
ALIGN="right"
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HREF="function.maxdb-debug.html"
ACCESSKEY="N"
>下一页</A
></TD
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