<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >ArrayIterator::key</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="Standard PHP Library (SPL) Functions" HREF="ref.spl.html"><LINK REL="PREVIOUS" TITLE="ArrayIterator::current" HREF="function.arrayiterator-current.html"><LINK REL="NEXT" TITLE="ArrayIterator::next" HREF="function.arrayiterator-next.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.arrayiterator-current.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.arrayiterator-next.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.ArrayIterator-key" ></A >ArrayIterator::key</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN213992" ></A ><P > (no version information, might be only in CVS)</P >ArrayIterator::key -- Return current array key</DIV ><DIV CLASS="refsect1" ><A NAME="AEN213995" ></A ><H2 >Description</H2 >mixed <B CLASS="methodname" >ArrayIterator::key</B > ( void )<BR ></BR ><P > This function returns the current array key </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN214003" ></A ><P ><B >例 1. <B CLASS="function" >ArrayIterator::key()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$array </font><font color="#007700">= array(</font><font color="#DD0000">'key' </font><font color="#007700">=> </font><font color="#DD0000">'value'</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$arrayobject </font><font color="#007700">= new </font><font color="#0000BB">ArrayObject</font><font color="#007700">(</font><font color="#0000BB">$array</font><font color="#007700">);<br /></font><font color="#0000BB">$iterator </font><font color="#007700">= </font><font color="#0000BB">$arrayobject</font><font color="#007700">-></font><font color="#0000BB">getIterator</font><font color="#007700">();<br /><br />echo </font><font color="#0000BB">$iterator</font><font color="#007700">-></font><font color="#0000BB">key</font><font color="#007700">(); </font><font color="#FF8000">//key<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </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.arrayiterator-current.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.arrayiterator-next.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >ArrayIterator::current</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.spl.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >ArrayIterator::next</TD ></TR ></TABLE ></DIV ></BODY ></HTML >