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

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><H1
><A
NAME="function.mysqli-stmt-result-metadata"
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>mysqli_stmt_result_metadata</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN142742"
></A
><P
>    (PHP 5)</P
>mysqli_stmt_result_metadata<P
>    (no version information, might be only in CVS)</P
>stmt-&#62;result_metadata()&nbsp;--&nbsp;Returns result set metadata from a prepared statement</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142746"
></A
><H2
>说明</H2
><P
>Procedural style:</P
>mysqli_result <B
CLASS="methodname"
>mysqli_stmt_result_metadata</B
> ( mysqli_stmt stmt )<BR
></BR
><P
>Object oriented style (method):</P
>class <B
CLASS="classname"
>mysqli_stmt</B
> { <BR
></BR
>mysqli_result <B
CLASS="methodname"
>result_metadata</B
> ( void  )<BR
></BR
>}<P
>&#13;   If a statement passed to <A
HREF="function.mysqli-prepare.html"
><B
CLASS="function"
>mysqli_prepare()</B
></A
> is one that produces
   a result set, <B
CLASS="function"
>mysqli_stmt_result_metadata()</B
> returns the result object
   that can be used to process the meta information such as total number of fields
   and individual field information.
  </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>This result set pointer can be passed as an argument to any of the
    field-based functions that process result set metadata, such as:
    <P
></P
><UL
><LI
><P
><A
HREF="function.mysqli-num-fields.html"
><B
CLASS="function"
>mysqli_num_fields()</B
></A
></P
></LI
><LI
><P
><A
HREF="function.mysqli-fetch-field.html"
><B
CLASS="function"
>mysqli_fetch_field()</B
></A
></P
></LI
><LI
><P
><A
HREF="function.mysqli-fetch-field-direct.html"
><B
CLASS="function"
>mysqli_fetch_field_direct()</B
></A
></P
></LI
><LI
><P
><A
HREF="function.mysqli-fetch-fields.html"
><B
CLASS="function"
>mysqli_fetch_fields()</B
></A
></P
></LI
><LI
><P
><A
HREF="function.mysqli-field-count.html"
><B
CLASS="function"
>mysqli_field_count()</B
></A
></P
></LI
><LI
><P
><A
HREF="function.mysqli-field-seek.html"
><B
CLASS="function"
>mysqli_field_seek()</B
></A
></P
></LI
><LI
><P
><A
HREF="function.mysqli-field-tell.html"
><B
CLASS="function"
>mysqli_field_tell()</B
></A
></P
></LI
><LI
><P
><A
HREF="function.mysqli-free-result.html"
><B
CLASS="function"
>mysqli_free_result()</B
></A
></P
></LI
></UL
>
   </P
></BLOCKQUOTE
></DIV
><P
>&#13;   The result set structure should be freed when you are done with it,
   which you can do by passing it to <A
HREF="function.mysqli-free-result.html"
><B
CLASS="function"
>mysqli_free_result()</B
></A
>
  </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
    The result set returned by <B
CLASS="function"
>mysqli_stmt_result_metadata()</B
> contains only
    metadata. It does not contain any row results. The rows are obtained by using the
    statement handle with <A
HREF="function.mysqli-stmt-fetch.html"
><B
CLASS="function"
>mysqli_stmt_fetch()</B
></A
>.
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142799"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>&#13;stmt</CODE
></DT
><DD
><P
>Procedural style only: A statement identifier
returned by <A
HREF="function.mysqli-stmt-init.html"
><B
CLASS="function"
>mysqli_stmt_init()</B
></A
>.</P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142809"
></A
><H2
>返回值</H2
><P
>&#13;   Returns a result object or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if an error occured.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142813"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN142816"
></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 />$mysqli </font><font color="#007700">= new </font><font color="#0000BB">mysqli</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"test"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"DROP TABLE IF EXISTS friends"</font><font color="#007700">);<br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"CREATE TABLE friends (id int, name varchar(20))"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">"SELECT id, name FROM friends"</font><font color="#007700">);<br /></font><font color="#0000BB">$stmt</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* get resultset for metadata */<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$stmt</font><font color="#007700">-&gt;</font><font color="#0000BB">result_metadata</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* retrieve field information from metadata result set */<br /></font><font color="#0000BB">$field </font><font color="#007700">= </font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">fetch_field</font><font color="#007700">();<br /><br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Fieldname: %s\n"</font><font color="#007700">, </font><font color="#0000BB">$field</font><font color="#007700">-&gt;</font><font color="#0000BB">name</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* close resultset */<br /></font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">close</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">$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
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN142819"
></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 />$link </font><font color="#007700">= </font><font color="#0000BB">mysqli_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"test"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"DROP TABLE IF EXISTS friends"</font><font color="#007700">);<br /></font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"CREATE TABLE friends (id int, name varchar(20))"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">mysqli_prepare</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"SELECT id, name FROM friends"</font><font color="#007700">);<br /></font><font color="#0000BB">mysqli_stmt_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* get resultset for metadata */<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">mysqli_stmt_result_metadata</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* retrieve field information from metadata result set */<br /></font><font color="#0000BB">$field </font><font color="#007700">= </font><font color="#0000BB">mysqli_fetch_field</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /><br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Fieldname: %s\n"</font><font color="#007700">, </font><font color="#0000BB">$field</font><font color="#007700">-&gt;</font><font color="#0000BB">name</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* close resultset */<br /></font><font color="#0000BB">mysqli_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">mysqli_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142822"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.mysqli-prepare.html"
><B
CLASS="function"
>mysqli_prepare()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-free-result.html"
><B
CLASS="function"
>mysqli_free_result()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
  </P
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