<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >pg_fetch_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="PostgreSQL 数据库函数" HREF="ref.pgsql.html"><LINK REL="PREVIOUS" TITLE="pg_fetch_object" HREF="function.pg-fetch-object.html"><LINK REL="NEXT" TITLE="pg_fetch_row" HREF="function.pg-fetch-row.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.pg-fetch-object.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.pg-fetch-row.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.pg-fetch-result" ></A >pg_fetch_result</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN185304" ></A ><P > (PHP 4 >= 4.2.0, PHP 5)</P >pg_fetch_result -- 从结果资源中返回值</DIV ><DIV CLASS="refsect1" ><A NAME="AEN185307" ></A ><H2 >说明</H2 >mixed <B CLASS="methodname" >pg_fetch_result</B > ( resource result, int row, mixed field )<BR ></BR ><P > <B CLASS="function" >pg_fetch_result()</B > 根据由 <A HREF="function.pg-query.html" ><B CLASS="function" >pg_query()</B ></A > 返回的 <CODE CLASS="parameter" >result</CODE > 资源返回相应的值。<CODE CLASS="parameter" >row</CODE > 为整型数。<CODE CLASS="parameter" >field</CODE > 为字段名(字符串)或字段索引(整数)。<CODE CLASS="parameter" >row</CODE > 和 <CODE CLASS="parameter" >field</CODE > 指明了查询结果中的哪个单元被返回。行编号从 0 开始。除了用字段名之外,还可以用不带引号的数字作为字段索引。字段索引从 0 开始。 </P ><P > PostgreSQL 有很多内置的类型,这里只直接支持基本类型。所有形式的 <A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >,<A HREF="language.types.boolean.html" ><B CLASS="type" >boolean</B ></A > 和 void 类型都被返回为 <A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A > 值。所有形式的 float 和 real 类型都被返回为 <A HREF="language.types.float.html" ><B CLASS="type" >float</B ></A > 值。Boolean 类型被返回为 "t" 或者 "f"。所有其它类型包括数组都被返回为字符串,该字符串的格式和默认的 PostgreSQL 风格一样,可以在 <B CLASS="command" >psql</B > 程序中看到。 </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.pg-fetch-object.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.pg-fetch-row.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >pg_fetch_object</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.pgsql.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >pg_fetch_row</TD ></TR ></TABLE ></DIV ></BODY ></HTML >