<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >key</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="Arrays" HREF="ref.array.html"><LINK REL="PREVIOUS" TITLE="in_array" HREF="function.in-array.html"><LINK REL="NEXT" TITLE="krsort" HREF="function.krsort.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.in-array.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.krsort.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.key" ></A >key</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN12698" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >key -- Retorna uma chave de um array associativo</DIV ><DIV CLASS="refsect1" ><A NAME="AEN12701" ></A ><H2 >Descrição</H2 >mixed <B CLASS="methodname" >key</B > ( array array )<BR ></BR ><P > <B CLASS="function" >key()</B > retorna a chave da posição corrente de um array. </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN12712" ></A ><P ><B >Exemplo 1. <B CLASS="function" >key()</B > exemplo</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php <br /> $array </font><font color="#007700">= array( <br /> </font><font color="#DD0000">'fruit1' </font><font color="#007700">=> </font><font color="#DD0000">'apple'</font><font color="#007700">, <br /> </font><font color="#DD0000">'fruit2' </font><font color="#007700">=> </font><font color="#DD0000">'orange'</font><font color="#007700">, <br /> </font><font color="#DD0000">'fruit3' </font><font color="#007700">=> </font><font color="#DD0000">'grape'</font><font color="#007700">, <br /> </font><font color="#DD0000">'fruit4' </font><font color="#007700">=> </font><font color="#DD0000">'apple'</font><font color="#007700">, <br /> </font><font color="#DD0000">'fruit5' </font><font color="#007700">=> </font><font color="#DD0000">'apple'</font><font color="#007700">); <br /> <br /> </font><font color="#FF8000">// este ciclo exibirá toda a chave do array associativo <br /> // onde o valor é igual a "apple" <br /> </font><font color="#007700">while (</font><font color="#0000BB">$fruit_name </font><font color="#007700">= </font><font color="#0000BB">current</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">)) { <br /> if (</font><font color="#0000BB">$fruit_name </font><font color="#007700">== </font><font color="#DD0000">'apple'</font><font color="#007700">) { <br /> echo </font><font color="#0000BB">key</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">).</font><font color="#DD0000">'<br>'</font><font color="#007700">; <br /> } <br /> </font><font color="#0000BB">next</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">); <br /> } <br /> </font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > Veja também <A HREF="function.current.html" ><B CLASS="function" >current()</B ></A > e <A HREF="function.next.html" ><B CLASS="function" >next()</B ></A >. </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.in-array.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.krsort.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >in_array</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.array.html" ACCESSKEY="U" >Acima</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >krsort</TD ></TR ></TABLE ></DIV ></BODY ></HTML >