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

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

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>db2_num_fields</H1
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>    (PECL)</P
>db2_num_fields&nbsp;--&nbsp;
   Returns the number of fields contained in a result set
  </DIV
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>说明</H2
>int <B
CLASS="methodname"
>db2_num_fields</B
> ( resource stmt )<BR
></BR
><P
>&#13;   Returns the number of fields contained in a result set. This is most useful
   for handling the result sets returned by dynamically generated queries, or
   for result sets returned by stored procedures, where your application cannot
   otherwise know how to retrieve and use the results.
  </P
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><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>stmt</CODE
></DT
><DD
><P
>&#13;       A valid statement resource containing a result set.
      </P
></DD
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>
  </P
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><H2
>返回值</H2
><P
>&#13;   Returns an integer value representing the number of fields in the result
   set associated with the specified statement resource. Returns <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if
   the statement resource is not a valid input value. 
  </P
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><H2
>范例</H2
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><B
>例 1. Retrieving the number of fields in a result set</B
></P
><P
>&#13;     The following example demonstrates how to retrieve the number of fields
     returned in a result set.
    </P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$sql </font><font color="#007700">= </font><font color="#DD0000">"SELECT id, name, breed, weight FROM animals ORDER BY breed"</font><font color="#007700">;<br /></font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">db2_prepare</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">$sql</font><font color="#007700">);<br /></font><font color="#0000BB">db2_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#0000BB">$sql</font><font color="#007700">);<br /></font><font color="#0000BB">$columns </font><font color="#007700">= </font><font color="#0000BB">db2_num_fields</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /><br />echo </font><font color="#DD0000">"There are </font><font color="#007700">{</font><font color="#DD0000">$columns</font><font color="#007700">}</font><font color="#DD0000"> columns in the result set."</font><font color="#007700">;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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><P
>上例将输出：</P
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>
  </P
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>参见</H2
><P
>&#13;   <P
></P
><TABLE
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><TR
><TD
><A
HREF="function.db2-execute.html"
><B
CLASS="function"
>db2_execute()</B
></A
></TD
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><TR
><TD
><A
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><B
CLASS="function"
>db2_field_display_size()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-field-name.html"
><B
CLASS="function"
>db2_field_name()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-field-num.html"
><B
CLASS="function"
>db2_field_num()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-field-precision.html"
><B
CLASS="function"
>db2_field_precision()</B
></A
></TD
></TR
><TR
><TD
><A
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><B
CLASS="function"
>db2_field_scale()</B
></A
></TD
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><B
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>db2_field_type()</B
></A
></TD
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>db2_field_width()</B
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