<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >array_intersect_ukey</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="Array 数组函数" HREF="ref.array.html"><LINK REL="PREVIOUS" TITLE="array_intersect_uassoc" HREF="function.array-intersect-uassoc.html"><LINK REL="NEXT" TITLE="array_intersect" HREF="function.array-intersect.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.array-intersect-uassoc.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.array-intersect.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.array-intersect-ukey" ></A >array_intersect_ukey</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN11190" ></A ><P > (PHP 5 >= 5.1.0RC1)</P >array_intersect_ukey -- 用回调函数比较键名来计算数组的交集</DIV ><DIV CLASS="refsect1" ><A NAME="AEN11193" ></A ><H2 >说明</H2 >array <B CLASS="methodname" >array_intersect_ukey</B > ( array array1, array array2 [, array ..., callback key_compare_func] )<BR ></BR ><P > <B CLASS="function" >array_intersect_ukey()</B > 返回一个数组,该数组包含了所有出现在 <CODE CLASS="parameter" >array1</CODE > 中并同时出现在所有其它参数数组中的键名的值。 </P ><P > 此比较是通过用户提供的回调函数来进行的。如果认为第一个参数小于,等于,或大于第二个参数时必须分别返回一个小于零,等于零,或大于零的整数。 </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN11215" ></A ><P ><B >例 1. <B CLASS="function" >array_intersect_ukey()</B > 例子</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#007700">function </font><font color="#0000BB">key_compare_func</font><font color="#007700">(</font><font color="#0000BB">$key1</font><font color="#007700">, </font><font color="#0000BB">$key2</font><font color="#007700">)<br />{<br /> if (</font><font color="#0000BB">$key1 </font><font color="#007700">== </font><font color="#0000BB">$key2</font><font color="#007700">)<br /> return </font><font color="#0000BB">0</font><font color="#007700">;<br /> else if (</font><font color="#0000BB">$key1 </font><font color="#007700">> </font><font color="#0000BB">$key2</font><font color="#007700">)<br /> return </font><font color="#0000BB">1</font><font color="#007700">;<br /> else<br /> return -</font><font color="#0000BB">1</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">$array1 </font><font color="#007700">= array(</font><font color="#DD0000">'blue' </font><font color="#007700">=> </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#DD0000">'red' </font><font color="#007700">=> </font><font color="#0000BB">2</font><font color="#007700">, </font><font color="#DD0000">'green' </font><font color="#007700">=> </font><font color="#0000BB">3</font><font color="#007700">, </font><font color="#DD0000">'purple' </font><font color="#007700">=> </font><font color="#0000BB">4</font><font color="#007700">);<br /></font><font color="#0000BB">$array2 </font><font color="#007700">= array(</font><font color="#DD0000">'green' </font><font color="#007700">=> </font><font color="#0000BB">5</font><font color="#007700">, </font><font color="#DD0000">'blue' </font><font color="#007700">=> </font><font color="#0000BB">6</font><font color="#007700">, </font><font color="#DD0000">'yellow' </font><font color="#007700">=> </font><font color="#0000BB">7</font><font color="#007700">, </font><font color="#DD0000">'cyan' </font><font color="#007700">=> </font><font color="#0000BB">8</font><font color="#007700">);<br /><br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">array_intersect_ukey</font><font color="#007700">(</font><font color="#0000BB">$array1</font><font color="#007700">, </font><font color="#0000BB">$array2</font><font color="#007700">, </font><font color="#DD0000">'key_compare_func'</font><font color="#007700">));<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P >上例将输出:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >array(2) { ["blue"]=> int(1) ["green"]=> int(3) })</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > 上例中可以看到只有 <TT CLASS="literal" >'blue'</TT > 和 <TT CLASS="literal" >'green'</TT > 两个键名出现在两个数组中,因此被返回。此外注意 <TT CLASS="literal" >'blue'</TT > 和 <TT CLASS="literal" >'green'</TT > 的值在两个数组中是不同的。但因为只检查键名,因此还是匹配。返回的值只是 <CODE CLASS="parameter" >array1</CODE > 中的。 </P ><P > 参见 <A HREF="function.array-diff.html" ><B CLASS="function" >array_diff()</B ></A >,<A HREF="function.array-udiff.html" ><B CLASS="function" >array_udiff()</B ></A >,<A HREF="function.array-diff-assoc.html" ><B CLASS="function" >array_diff_assoc()</B ></A >,<A HREF="function.array-diff-uassoc.html" ><B CLASS="function" >array_diff_uassoc()</B ></A >,<A HREF="function.array-udiff-assoc.html" ><B CLASS="function" >array_udiff_assoc()</B ></A >,<A HREF="function.array-udiff-uassoc.html" ><B CLASS="function" >array_udiff_uassoc()</B ></A >,<A HREF="function.array-diff-key.html" ><B CLASS="function" >array_diff_key()</B ></A >,<A HREF="function.array-diff-ukey.html" ><B CLASS="function" >array_diff_ukey()</B ></A >,<A HREF="function.array-intersect.html" ><B CLASS="function" >array_intersect()</B ></A >,<A HREF="function.array-intersect-assoc.html" ><B CLASS="function" >array_intersect_assoc()</B ></A >,<A HREF="function.array-intersect-uassoc.html" ><B CLASS="function" >array_intersect_uassoc()</B ></A > 和 <A HREF="function.array-intersect-key.html" ><B CLASS="function" >array_intersect_key()</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.array-intersect-uassoc.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.array-intersect.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >array_intersect_uassoc</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.array.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >array_intersect</TD ></TR ></TABLE ></DIV ></BODY ></HTML >