<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >dbase_numfields</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="dBase Functions" HREF="ref.dbase.html"><LINK REL="PREVIOUS" TITLE="dbase_get_record" HREF="function.dbase-get-record.html"><LINK REL="NEXT" TITLE="dbase_numrecords" HREF="function.dbase-numrecords.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.dbase-get-record.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.dbase-numrecords.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.dbase-numfields" ></A >dbase_numfields</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN34205" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >dbase_numfields -- Gets the number of fields of a database</DIV ><DIV CLASS="refsect1" ><A NAME="AEN34208" ></A ><H2 >说明</H2 >int <B CLASS="methodname" >dbase_numfields</B > ( int dbase_identifier )<BR ></BR ><P > Gets the number of fields (columns) in the specified database. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > Field numbers are between 0 and dbase_numfields($db)-1, while record numbers are between 1 and dbase_numrecords($db). </P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN34219" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >dbase_identifier</CODE ></DT ><DD ><P > The database link identifier, returned by <A HREF="function.dbase-open.html" ><B CLASS="function" >dbase_open()</B ></A > or <A HREF="function.dbase-create.html" ><B CLASS="function" >dbase_create()</B ></A >. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN34230" ></A ><H2 >返回值</H2 ><P > The number of fields in the database, or <TT CLASS="constant" ><B >FALSE</B ></TT > if an error occurs. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN34234" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN34237" ></A ><P ><B >例 1. <B CLASS="function" >dbase_numfields()</B > Example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /><br />$rec </font><font color="#007700">= </font><font color="#0000BB">dbase_get_record</font><font color="#007700">(</font><font color="#0000BB">$db</font><font color="#007700">, </font><font color="#0000BB">$recno</font><font color="#007700">);<br /></font><font color="#0000BB">$nf </font><font color="#007700">= </font><font color="#0000BB">dbase_numfields</font><font color="#007700">(</font><font color="#0000BB">$db</font><font color="#007700">);<br />for (</font><font color="#0000BB">$i </font><font color="#007700">= </font><font color="#0000BB">0</font><font color="#007700">; </font><font color="#0000BB">$i </font><font color="#007700">< </font><font color="#0000BB">$nf</font><font color="#007700">; </font><font color="#0000BB">$i</font><font color="#007700">++) {<br /> echo </font><font color="#0000BB">$rec</font><font color="#007700">[</font><font color="#0000BB">$i</font><font color="#007700">], </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN34241" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.dbase-numrecords.html" ><B CLASS="function" >dbase_numrecords()</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.dbase-get-record.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.dbase-numrecords.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >dbase_get_record</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.dbase.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >dbase_numrecords</TD ></TR ></TABLE ></DIV ></BODY ></HTML >