<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >maxdb_stmt_result_metadata</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="MaxDB PHP Extension" HREF="ref.maxdb.html"><LINK REL="PREVIOUS" TITLE="maxdb_stmt_reset" HREF="function.maxdb-stmt-reset.html"><LINK REL="NEXT" TITLE="maxdb_stmt_send_long_data" HREF="function.maxdb-stmt-send-long-data.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.maxdb-stmt-reset.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.maxdb-stmt-send-long-data.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.maxdb-stmt-result-metadata" ></A >maxdb_stmt_result_metadata</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN113447" ></A ><P > (PECL)</P >maxdb_stmt_result_metadata -- Returns result set metadata from a prepared statement</DIV ><DIV CLASS="refsect1" ><A NAME="AEN113450" ></A ><H2 >Description</H2 ><P >Procedural style:</P >resource <B CLASS="methodname" >maxdb_stmt_result_metadata</B > ( resource stmt )<BR ></BR ><P >Object oriented style (method):</P >class <B CLASS="classname" >stmt</B > { <BR ></BR >resource <B CLASS="methodname" >result_metadata</B > ( void )<BR ></BR >}<P > If a statement passed to <A HREF="function.maxdb-prepare.html" ><B CLASS="function" >maxdb_prepare()</B ></A > is one that produces a result set, <B CLASS="function" >maxdb_stmt_result_metadata()</B > returns the result resource 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.maxdb-num-fields.html" ><B CLASS="function" >maxdb_num_fields()</B ></A ></P ></LI ><LI ><P ><A HREF="function.maxdb-fetch-field.html" ><B CLASS="function" >maxdb_fetch_field()</B ></A ></P ></LI ><LI ><P ><A HREF="function.maxdb-fetch-field-direct.html" ><B CLASS="function" >maxdb_fetch_field_direct()</B ></A ></P ></LI ><LI ><P ><A HREF="function.maxdb-fetch-fields.html" ><B CLASS="function" >maxdb_fetch_fields()</B ></A ></P ></LI ><LI ><P ><A HREF="function.maxdb-field-count.html" ><B CLASS="function" >maxdb_field_count()</B ></A ></P ></LI ><LI ><P ><A HREF="function.maxdb-field-seek.html" ><B CLASS="function" >maxdb_field_seek()</B ></A ></P ></LI ><LI ><P ><A HREF="function.maxdb-field-tell.html" ><B CLASS="function" >maxdb_field_tell()</B ></A ></P ></LI ><LI ><P ><A HREF="function.maxdb-free-result.html" ><B CLASS="function" >maxdb_free_result()</B ></A ></P ></LI ></UL > </P ></BLOCKQUOTE ></DIV ><P > The result set structure should be freed when you are done with it, which you can do by passing it to <A HREF="function.maxdb-free-result.html" ><B CLASS="function" >maxdb_free_result()</B ></A > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > The result set returned by <B CLASS="function" >maxdb_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.maxdb-fetch.html" ><B CLASS="function" >maxdb_fetch()</B ></A >. </P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN113503" ></A ><H2 >返回值</H2 ><P > <B CLASS="function" >maxdb_stmt_result_metadata()</B > returns a result resource or <TT CLASS="constant" ><B >FALSE</B ></TT > if an error occured. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN113508" ></A ><H2 >See also:</H2 ><P > <A HREF="function.maxdb-prepare.html" ><B CLASS="function" >maxdb_prepare()</B ></A >, <A HREF="function.maxdb-free-result.html" ><B CLASS="function" >maxdb_free_result()</B ></A > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN113513" ></A ><H2 >Example</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN113516" ></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"><?php<br />$maxdb </font><font color="#007700">= new </font><font color="#0000BB">maxdb</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"MONA"</font><font color="#007700">, </font><font color="#DD0000">"RED"</font><font color="#007700">, </font><font color="#DD0000">"DEMODB"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$maxdb</font><font color="#007700">-></font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"CREATE TABLE temp.friends (id int, name varchar(20))"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$maxdb</font><font color="#007700">-></font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"INSERT INTO temp.friends VALUES (1,'Hartmut')"</font><font color="#007700">);<br /></font><font color="#0000BB">$maxdb</font><font color="#007700">-></font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"INSERT INTO temp.friends VALUES (2, 'Ulf')"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">$maxdb</font><font color="#007700">-></font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">"SELECT id, name FROM temp.friends"</font><font color="#007700">);<br /></font><font color="#0000BB">$stmt</font><font color="#007700">-></font><font color="#0000BB">execute</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* get resultset for metadata */<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$stmt</font><font color="#007700">-></font><font color="#0000BB">result_metadata</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* retrieve field information from metadata result set */<br /></font><font color="#0000BB">$field </font><font color="#007700">= </font><font color="#0000BB">$result</font><font color="#007700">-></font><font color="#0000BB">fetch_field</font><font color="#007700">();<br /><br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Fieldname: %s\n"</font><font color="#007700">, </font><font color="#0000BB">$field</font><font color="#007700">-></font><font color="#0000BB">name</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* close resultset */<br /></font><font color="#0000BB">$result</font><font color="#007700">-></font><font color="#0000BB">close</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">$maxdb</font><font color="#007700">-></font><font color="#0000BB">close</font><font color="#007700">();<br /></font><font color="#0000BB">?></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="AEN113519" ></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"><?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">maxdb_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"MONA"</font><font color="#007700">, </font><font color="#DD0000">"RED"</font><font color="#007700">, </font><font color="#DD0000">"DEMODB"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">maxdb_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"CREATE TABLE temp.friends (id int, name varchar(20))"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">maxdb_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"INSERT INTO temp.friends VALUES (1,'Hartmut')"</font><font color="#007700">);<br /></font><font color="#0000BB">maxdb_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"INSERT INTO temp.friends VALUES (2, 'Ulf')"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">maxdb_prepare</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"SELECT id, name FROM temp.friends"</font><font color="#007700">);<br /></font><font color="#0000BB">maxdb_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">maxdb_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">maxdb_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">-></font><font color="#0000BB">name</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* close resultset */<br /></font><font color="#0000BB">maxdb_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">maxdb_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > The above examples would produce the following output: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >Fieldname: ID</PRE ></TD ></TR ></TABLE ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.maxdb-stmt-reset.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.maxdb-stmt-send-long-data.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >maxdb_stmt_reset</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.maxdb.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >maxdb_stmt_send_long_data</TD ></TR ></TABLE ></DIV ></BODY ></HTML >