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

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>mysqli_data_seek</TITLE
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>PHP 手册</TH
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><H1
><A
NAME="function.mysqli-data-seek"
></A
>mysqli_data_seek</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN138022"
></A
><P
>    (PHP 5)</P
>mysqli_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="AEN138026"
></A
><H2
>说明</H2
><P
>Procedural style:</P
>bool <B
CLASS="methodname"
>mysqli_data_seek</B
> ( mysqli_result result, int offset )<BR
></BR
><P
>Object oriented style (method):</P
>class <B
CLASS="classname"
>mysqli_result</B
> { <BR
></BR
>bool <B
CLASS="methodname"
>data_seek</B
> ( int offset )<BR
></BR
>}<P
>&#13;   The <B
CLASS="function"
>mysqli_data_seek()</B
> function seeks to an arbitrary
   result pointer specified by the <CODE
CLASS="parameter"
>offset</CODE
> in the
   result set.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN138051"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>&#13;result</CODE
></DT
><DD
><P
>Procedural style only: A result set
identifier returned by <A
HREF="function.mysqli-query.html"
><B
CLASS="function"
>mysqli_query()</B
></A
>, <A
HREF="function.mysqli-store-result.html"
><B
CLASS="function"
>mysqli_store_result()</B
></A
>
or <A
HREF="function.mysqli-use-result.html"
><B
CLASS="function"
>mysqli_use_result()</B
></A
>.</P
></DD
><DT
><CODE
CLASS="parameter"
>offset</CODE
></DT
><DD
><P
>&#13;       The field offset. Must be between zero and the total number of rows
       minus one (0..<A
HREF="function.mysqli-num-rows.html"
><B
CLASS="function"
>mysqli_num_rows()</B
></A
> - 1).
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN138069"
></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="AEN138074"
></A
><H2
>注释</H2
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
    This function can only be used with buffered results attained from the
    use of the <A
HREF="function.mysqli-store-result.html"
><B
CLASS="function"
>mysqli_store_result()</B
></A
> or
    <A
HREF="function.mysqli-query.html"
><B
CLASS="function"
>mysqli_query()</B
></A
> functions.
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN138080"
></A
><H2
>范例</H2
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN138082"
></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">$mysqli </font><font color="#007700">= new </font><font color="#0000BB">mysqli</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br />&nbsp;&nbsp;&nbsp;&nbsp;exit();<br />}<br /><br /></font><font color="#0000BB">$query </font><font color="#007700">= </font><font color="#DD0000">"SELECT Name, CountryCode FROM City ORDER BY Name"</font><font color="#007700">;<br />if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">( </font><font color="#0000BB">$query</font><font color="#007700">)) {<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* seek to row no. 400 */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">data_seek</font><font color="#007700">(</font><font color="#0000BB">399</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* fetch row */<br />&nbsp;&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;&nbsp;</font><font color="#0000BB">printf </font><font color="#007700">(</font><font color="#DD0000">"City: %s&nbsp;&nbsp;Countrycode: %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;&nbsp;</font><font color="#FF8000">/* free result set*/<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">close</font><font color="#007700">();<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">$mysqli</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
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BORDER="0"
CELLPADDING="0"
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN138085"
></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 /></font><font color="#FF8000">/* Open a connection */<br /></font><font color="#0000BB">$link </font><font color="#007700">= </font><font color="#0000BB">mysqli_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (!</font><font color="#0000BB">$link</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&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">mysqli_connect_error</font><font color="#007700">());<br />&nbsp;&nbsp;&nbsp;&nbsp;exit();<br />}<br /><br /></font><font color="#0000BB">$query </font><font color="#007700">= </font><font color="#DD0000">"SELECT Name, CountryCode FROM City ORDER BY Name"</font><font color="#007700">;<br /><br />if (</font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">mysqli_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;&nbsp;</font><font color="#FF8000">/* seek to row no. 400 */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">mysqli_data_seek</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">399</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* fetch row */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$row </font><font color="#007700">= </font><font color="#0000BB">mysqli_fetch_row</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf </font><font color="#007700">(</font><font color="#DD0000">"City: %s&nbsp;&nbsp;Countrycode: %s\n"</font><font color="#007700">, </font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#0000BB">0</font><font color="#007700">], </font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#0000BB">1</font><font color="#007700">]);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* free result set*/<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">mysqli_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">mysqli_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
>上例将输出:</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>City: Benin City  Countrycode: NGA</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN138090"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.mysqli-store-result.html"
><B
CLASS="function"
>mysqli_store_result()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-fetch-row.html"
><B
CLASS="function"
>mysqli_fetch_row()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-fetch-array.html"
><B
CLASS="function"
>mysqli_fetch_array()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-fetch-assoc.html"
><B
CLASS="function"
>mysqli_fetch_assoc()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-fetch-object.html"
><B
CLASS="function"
>mysqli_fetch_object()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-query.html"
><B
CLASS="function"
>mysqli_query()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-num-rows.html"
><B
CLASS="function"
>mysqli_num_rows()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
  </P
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