<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >db2_result</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="IBM DB2, Cloudscape and Apache Derby Functions" HREF="ref.ibm-db2.html"><LINK REL="PREVIOUS" TITLE="db2_procedures" HREF="function.db2-procedures.html"><LINK REL="NEXT" TITLE="db2_rollback" HREF="function.db2-rollback.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.db2-procedures.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.db2-rollback.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.db2-result" ></A >db2_result</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN82562" ></A ><P > (PECL)</P >db2_result -- Returns a single column from a row in the result set </DIV ><DIV CLASS="refsect1" ><A NAME="AEN82565" ></A ><H2 >说明</H2 >mixed <B CLASS="methodname" >db2_result</B > ( resource stmt, mixed column )<BR ></BR ><P > Use <B CLASS="function" >db2_result()</B > to return the value of a specified column in the current row of a result set. You must call <A HREF="function.db2-fetch-row.html" ><B CLASS="function" >db2_fetch_row()</B ></A > before calling <B CLASS="function" >db2_result()</B > to set the location of the result set pointer. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN82580" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >stmt</CODE ></DT ><DD ><P > A valid <TT CLASS="literal" >stmt</TT > resource. </P ></DD ><DT ><CODE CLASS="parameter" >column</CODE ></DT ><DD ><P > Either an integer mapping to the 0-indexed field in the result set, or a string matching the name of the column. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN82595" ></A ><H2 >返回值</H2 ><P > Returns the value of the requested field if the field exists in the result set. Returns NULL if the field does not exist, and issues a warning. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN82598" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN82601" ></A ><P ><B >例 1. A <B CLASS="function" >db2_result()</B > example</B ></P ><P > The following example demonstrates how to iterate through a result set with <A HREF="function.db2-fetch-row.html" ><B CLASS="function" >db2_fetch_row()</B ></A > and retrieve columns from the result set with <B CLASS="function" >db2_result()</B >. </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$sql </font><font color="#007700">= </font><font color="#DD0000">'SELECT name, breed FROM animals WHERE weight < ?'</font><font color="#007700">;<br /></font><font color="#0000BB">$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">$stmt</font><font color="#007700">, array(</font><font color="#0000BB">10</font><font color="#007700">));<br />while (</font><font color="#0000BB">db2_fetch_row</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">)) {<br /> </font><font color="#0000BB">$name </font><font color="#007700">= </font><font color="#0000BB">db2_result</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /> </font><font color="#0000BB">$breed </font><font color="#007700">= </font><font color="#0000BB">db2_result</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#DD0000">'BREED'</font><font color="#007700">);<br /> print </font><font color="#DD0000">"$name $breed"</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P >上例将输出:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >cat Pook gold fish Bubbles budgerigar Gizmo goat Rickety Ride</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN82610" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.db2-fetch-array.html" ><B CLASS="function" >db2_fetch_array()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.db2-fetch-assoc.html" ><B CLASS="function" >db2_fetch_assoc()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.db2-fetch-both.html" ><B CLASS="function" >db2_fetch_both()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.db2-fetch-object.html" ><B CLASS="function" >db2_fetch_object()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.db2-fetch-row.html" ><B CLASS="function" >db2_fetch_row()</B ></A ></TD ></TR ></TBODY ></TABLE ><P ></P > </P ></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.db2-procedures.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.db2-rollback.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >db2_procedures</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.ibm-db2.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >db2_rollback</TD ></TR ></TABLE ></DIV ></BODY ></HTML >