Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>hash_init</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_hmac"
HREF="function.hash-hmac.html"><LINK
REL="NEXT"
TITLE="hash_update_file"
HREF="function.hash-update-file.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-hmac.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-file.html"
ACCESSKEY="N"
>下一页</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="function.hash-init"
></A
>hash_init</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN73718"
></A
><P
>    (no version information, might be only in CVS)</P
>hash_init&nbsp;--&nbsp;Initialize an incremental hashing context</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN73721"
></A
><H2
>说明</H2
>resource <B
CLASS="methodname"
>hash_init</B
> ( string algo [, int options, string key] )<BR
></BR
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN73735"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>algo</CODE
></DT
><DD
><P
>&#13;       Name of selected hashing algorithm (i.e. "md5", "sha256", "haval160,4", etc..)
      </P
></DD
><DT
><CODE
CLASS="parameter"
>options</CODE
></DT
><DD
><P
>&#13;       Optional settings for hash generation, currently supports only one option:
       <TT
CLASS="constant"
><B
>HASH_HMAC</B
></TT
>.  When specified, the <CODE
CLASS="parameter"
>key</CODE
>
       <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>must</I
></SPAN
> be specified.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>key</CODE
></DT
><DD
><P
>&#13;       When <TT
CLASS="constant"
><B
>HASH_HMAC</B
></TT
> is specified for <CODE
CLASS="parameter"
>options</CODE
>,
       a shared secret key to be used with the HMAC hashing method must be supplied in this
       parameter.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN73759"
></A
><H2
>返回值</H2
><P
>&#13;   Returns a Hashing Context resource for use with <A
HREF="function.hash-update.html"
><B
CLASS="function"
>hash_update()</B
></A
>,
   <A
HREF="function.hash-update-stream.html"
><B
CLASS="function"
>hash_update_stream()</B
></A
>, <A
HREF="function.hash-update-file.html"
><B
CLASS="function"
>hash_update_file()</B
></A
>,
   and <A
HREF="function.hash-final.html"
><B
CLASS="function"
>hash_final()</B
></A
>.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN73766"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN73769"
></A
><P
><B
>例 1. Incremental hashing example</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$ctx </font><font color="#007700">= </font><font color="#0000BB">hash_init</font><font color="#007700">(</font><font color="#DD0000">'md5'</font><font color="#007700">);<br /></font><font color="#0000BB">hash_update</font><font color="#007700">(</font><font color="#0000BB">$ctx</font><font color="#007700">, </font><font color="#DD0000">'The quick brown fox '</font><font color="#007700">);<br /></font><font color="#0000BB">hash_update</font><font color="#007700">(</font><font color="#0000BB">$ctx</font><font color="#007700">, </font><font color="#DD0000">'jumped over the lazy dog.'</font><font color="#007700">);<br />echo </font><font color="#0000BB">hash_final</font><font color="#007700">(</font><font color="#0000BB">$ctx</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</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="AEN73774"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><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
><TR
><TD
><A
HREF="function.hash-hmac.html"
><B
CLASS="function"
>hash_hmac()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.hash-hmac-file.html"
><B
CLASS="function"
>hash_hmac_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-hmac.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-file.html"
ACCESSKEY="N"
>下一页</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>hash_hmac</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_file</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>