<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >array_intersect</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_ukey" HREF="function.array-intersect-ukey.html"><LINK REL="NEXT" TITLE="array_key_exists" HREF="function.array-key-exists.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-ukey.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-key-exists.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.array-intersect" ></A >array_intersect</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN11241" ></A ><P > (PHP 4 >= 4.0.1, PHP 5)</P >array_intersect -- 计算数组的交集</DIV ><DIV CLASS="refsect1" ><A NAME="AEN11244" ></A ><H2 >说明</H2 >array <B CLASS="methodname" >array_intersect</B > ( array array1, array array2 [, array ...] )<BR ></BR ><P > <B CLASS="function" >array_intersect()</B > 返回一个数组,该数组包含了所有在 <CODE CLASS="parameter" >array1</CODE > 中也同时出现在所有其它参数数组中的值。注意键名保留不变。 </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN11262" ></A ><P ><B >例 1. <B CLASS="function" >array_intersect()</B > 例子</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$array1 </font><font color="#007700">= array(</font><font color="#DD0000">"a" </font><font color="#007700">=> </font><font color="#DD0000">"green"</font><font color="#007700">, </font><font color="#DD0000">"red"</font><font color="#007700">, </font><font color="#DD0000">"blue"</font><font color="#007700">);<br /></font><font color="#0000BB">$array2 </font><font color="#007700">= array(</font><font color="#DD0000">"b" </font><font color="#007700">=> </font><font color="#DD0000">"green"</font><font color="#007700">, </font><font color="#DD0000">"yellow"</font><font color="#007700">, </font><font color="#DD0000">"red"</font><font color="#007700">);<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">array_intersect</font><font color="#007700">(</font><font color="#0000BB">$array1</font><font color="#007700">, </font><font color="#0000BB">$array2</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P > 这使得 <CODE CLASS="varname" >$result</CODE > 成为: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> Array<br />(<br /> [a] => green<br /> [0] => red<br />)</font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > 两个单元仅在 <TT CLASS="literal" >(string) $elem1 === (string) $elem2</TT > 时被认为是相同的。也就是说,当字符串的表达是一样的时候。 </P ></BLOCKQUOTE ></DIV ><P > 参见 <A HREF="function.array-intersect-assoc.html" ><B CLASS="function" >array_intersect_assoc()</B ></A >,<A HREF="function.array-diff.html" ><B CLASS="function" >array_diff()</B ></A > 和 <A HREF="function.array-diff-assoc.html" ><B CLASS="function" >array_diff_assoc()</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-ukey.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-key-exists.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >array_intersect_ukey</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_key_exists</TD ></TR ></TABLE ></DIV ></BODY ></HTML >