<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >mysql_num_fields</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="Manual do PHP" HREF="index.html"><LINK REL="UP" TITLE="Funções do MySQL" HREF="ref.mysql.html"><LINK REL="PREVIOUS" TITLE="mysql_list_tables" HREF="function.mysql-list-tables.html"><LINK REL="NEXT" TITLE="mysql_num_rows" HREF="function.mysql-num-rows.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" >Manual do PHP</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.mysql-list-tables.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.mysql-num-rows.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.mysql-num-fields" ></A >mysql_num_fields</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN131489" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >mysql_num_fields -- Obtém o numero de campos em um resultado</DIV ><DIV CLASS="refsect1" ><A NAME="AEN131492" ></A ><H2 >Descrição</H2 >int <B CLASS="methodname" >mysql_num_fields</B > ( resource result )<BR ></BR ><P > Obtém o numero de campos de uma consulta. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN131501" ></A ><H2 >Parâmetros</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" > result</CODE ></DT ><DD ><P >O resulatado <A HREF="language.types.resource.html" ><B CLASS="type" >resource</B ></A > que esta sendo avaliado. Este resultado vem de uma chamada a <A HREF="function.mysql-query.html" ><B CLASS="function" >mysql_query()</B ></A >.</P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN131512" ></A ><H2 >Valores de retornado</H2 ><P > Retorna o numero de capos em um conjunto de resultados <A HREF="language.types.resource.html" ><B CLASS="type" >resource</B ></A > em caso de sucesso, ou <TT CLASS="constant" ><B >FALSE</B ></TT > em caso de falha. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN131517" ></A ><H2 >Exemplos</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN131520" ></A ><P ><B >Exemplo 1. Exemplo <B CLASS="function" >mysql_num_fields()</B ></B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$result </font><font color="#007700">= </font><font color="#0000BB">mysql_query</font><font color="#007700">(</font><font color="#DD0000">"SELECT id,email FROM people WHERE id = '42'"</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$result</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">'Could not run query: ' </font><font color="#007700">. </font><font color="#0000BB">mysql_error</font><font color="#007700">();<br /> exit;<br />}<br /><br /></font><font color="#FF8000">/* returns 2 because id,email === two fields */<br /></font><font color="#007700">echo </font><font color="#0000BB">mysql_num_fields</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN131524" ></A ><H2 >Notas</H2 ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Nota: </B > Para compatibilidade com versões anteriores, o seguinte apelido obsoleto pode ser usado: <B CLASS="function" >mysql_numfields()</B > </P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN131529" ></A ><H2 >Veja também</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.mysql-select-db.html" ><B CLASS="function" >mysql_select_db()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.mysql-query.html" ><B CLASS="function" >mysql_query()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.mysql-fetch-field.html" ><B CLASS="function" >mysql_fetch_field()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.mysql-num-rows.html" ><B CLASS="function" >mysql_num_rows()</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.mysql-list-tables.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Principal</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.mysql-num-rows.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >mysql_list_tables</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.mysql.html" ACCESSKEY="U" >Acima</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >mysql_num_rows</TD ></TR ></TABLE ></DIV ></BODY ></HTML >