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

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

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>mysql_num_rows</H1
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>    (PHP 3, PHP 4, PHP 5)</P
>mysql_num_rows&nbsp;--&nbsp;取得结果集中行的数目</DIV
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>说明</H2
>int <B
CLASS="methodname"
>mysql_num_rows</B
> ( resource result )<BR
></BR
><P
>&#13;     <B
CLASS="function"
>mysql_num_rows()</B
>
     返回结果集中行的数目。此命令仅对
     SELECT 语句有效。要取得被
     INSERT，UPDATE 或者
     DELETE 查询所影响到的行的数目，用
     <A
HREF="function.mysql-affected-rows.html"
><B
CLASS="function"
>mysql_affected_rows()</B
></A
>。
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>例 1. <B
CLASS="function"
>mysql_num_rows()</B
> 例子</B
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$link </font><font color="#007700">= </font><font color="#0000BB">mysql_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"mysql_user"</font><font color="#007700">, </font><font color="#DD0000">"mysql_password"</font><font color="#007700">);<br /></font><font color="#0000BB">mysql_select_db</font><font color="#007700">(</font><font color="#DD0000">"database"</font><font color="#007700">, </font><font color="#0000BB">$link</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">mysql_query</font><font color="#007700">(</font><font color="#DD0000">"SELECT * FROM table1"</font><font color="#007700">, </font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">$num_rows </font><font color="#007700">= </font><font color="#0000BB">mysql_num_rows</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /><br />echo </font><font color="#DD0000">"$num_rows Rows</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
    </P
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><B
>注意: </B
>
      如果使用
      <A
HREF="function.mysql-unbuffered-query.html"
><B
CLASS="function"
>mysql_unbuffered_query()</B
></A
>，则直到结果集中的所有行都被提取后
      <B
CLASS="function"
>mysql_num_rows()</B
>
      才能返回正确的值。
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     参见
     <A
HREF="function.mysql-affected-rows.html"
><B
CLASS="function"
>mysql_affected_rows()</B
></A
>，<A
HREF="function.mysql-connect.html"
><B
CLASS="function"
>mysql_connect()</B
></A
>，<A
HREF="function.mysql-data-seek.html"
><B
CLASS="function"
>mysql_data_seek()</B
></A
>，<A
HREF="function.mysql-select-db.html"
><B
CLASS="function"
>mysql_select_db()</B
></A
> 和
     <A
HREF="function.mysql-query.html"
><B
CLASS="function"
>mysql_query()</B
></A
>。
    </P
><P
>&#13;     为向下兼容仍然可以使用
     <B
CLASS="function"
>mysql_numrows()</B
>，但反对这样做。
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