<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >hash_update_stream</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="hash Functions" HREF="ref.hash.html"><LINK REL="PREVIOUS" TITLE="hash_update_file" HREF="function.hash-update-file.html"><LINK REL="NEXT" TITLE="hash_update" HREF="function.hash-update.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.hash-update-file.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.hash-update.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.hash-update-stream" ></A >hash_update_stream</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN73847" ></A ><P > (no version information, might be only in CVS)</P >hash_update_stream -- Pump data into an active hashing context from an open stream</DIV ><DIV CLASS="refsect1" ><A NAME="AEN73850" ></A ><H2 >说明</H2 >int <B CLASS="methodname" >hash_update_stream</B > ( resource context, resource handle [, int length] )<BR ></BR ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN73864" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >context</CODE ></DT ><DD ><P > Hashing context returned by <A HREF="function.hash-init.html" ><B CLASS="function" >hash_init()</B ></A >. </P ></DD ><DT ><CODE CLASS="parameter" >handle</CODE ></DT ><DD ><P > Open file handle as returned by any stream creation function. </P ></DD ><DT ><CODE CLASS="parameter" >length</CODE ></DT ><DD ><P > Maximum number of characters to copy from <CODE CLASS="parameter" >handle</CODE > into the hashing context. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN73885" ></A ><H2 >返回值</H2 ><P > Actual number of bytes added to the hashing context from <CODE CLASS="parameter" >handle</CODE >. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN73889" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN73892" ></A ><P ><B >例 1. <B CLASS="function" >hash_update_stream()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$fp </font><font color="#007700">= </font><font color="#0000BB">tmpfile</font><font color="#007700">();<br /></font><font color="#0000BB">fwrite</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#DD0000">'The quick brown fox jumped over the lazy dog.'</font><font color="#007700">);<br /></font><font color="#0000BB">rewind</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$ctx </font><font color="#007700">= </font><font color="#0000BB">hash_init</font><font color="#007700">(</font><font color="#DD0000">'md5'</font><font color="#007700">);<br /></font><font color="#0000BB">hash_update_stream</font><font color="#007700">(</font><font color="#0000BB">$ctx</font><font color="#007700">, </font><font color="#0000BB">$fp</font><font color="#007700">);<br />echo </font><font color="#0000BB">hash_final</font><font color="#007700">(</font><font color="#0000BB">$ctx</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" >5c6ffbdd40d9556b73a21e63c3e0e904</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN73898" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.hash-init.html" ><B CLASS="function" >hash_init()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.hash-update.html" ><B CLASS="function" >hash_update()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.hash-final.html" ><B CLASS="function" >hash_final()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.hash.html" ><B CLASS="function" >hash()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.hash-file.html" ><B CLASS="function" >hash_file()</B ></A ></TD ></TR ></TBODY ></TABLE ><P ></P > </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.hash-update-file.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.hash-update.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >hash_update_file</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.hash.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >hash_update</TD ></TR ></TABLE ></DIV ></BODY ></HTML >