<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >spl_object_hash</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="spl_classes" HREF="function.spl-classes.html"><LINK REL="NEXT" TITLE="SQLite Functions" HREF="ref.sqlite.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.spl-classes.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="ref.sqlite.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.spl-object-hash" ></A >spl_object_hash</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN215267" ></A ><P > (PHP 5 >= 5.2.0)</P >spl_object_hash -- Return hash id for given object </DIV ><DIV CLASS="refsect1" ><A NAME="AEN215270" ></A ><H2 >Description</H2 >string <B CLASS="methodname" >spl_object_hash</B > ( object obj )<BR ></BR ><P > This function returns an unique identifier for the object. This id can be used as a hash key for storing objects or for identifying an object. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN215279" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >class</CODE ></DT ><DD ><P > Any object. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN215288" ></A ><H2 >返回值</H2 ><P > Returns string that is unique for each object and is always the same for the same object. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN215291" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN215294" ></A ><P ><B >例 1. A <B CLASS="function" >spl_object_hash()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$id </font><font color="#007700">= </font><font color="#0000BB">spl_object_hash</font><font color="#007700">(</font><font color="#0000BB">$object</font><font color="#007700">);<br /></font><font color="#0000BB">$storage</font><font color="#007700">[</font><font color="#0000BB">$id</font><font color="#007700">] = </font><font color="#0000BB">$object</font><font color="#007700">;<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.spl-classes.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="ref.sqlite.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >spl_classes</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" >SQLite Functions</TD ></TR ></TABLE ></DIV ></BODY ></HTML >