<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >sha1</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="String 字符串处理函数" HREF="ref.strings.html"><LINK REL="PREVIOUS" TITLE="sha1_file" HREF="function.sha1-file.html"><LINK REL="NEXT" TITLE="similar_text" HREF="function.similar-text.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.sha1-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.similar-text.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.sha1" ></A >sha1</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN226754" ></A ><P > (PHP 4 >= 4.3.0, PHP 5)</P >sha1 -- Calculate the sha1 hash of a string</DIV ><DIV CLASS="refsect1" ><A NAME="AEN226757" ></A ><H2 >Description</H2 >string <B CLASS="methodname" >sha1</B > ( string str [, bool raw_output] )<BR ></BR ><P > Calculates the sha1 hash of <CODE CLASS="parameter" >str</CODE > using the <A HREF="http://www.faqs.org/rfcs/rfc3174" TARGET="_top" >US Secure Hash Algorithm 1</A >, and returns that hash. The hash is a 40-character hexadecimal number. If the optional <CODE CLASS="parameter" >raw_output</CODE > is set to <TT CLASS="constant" ><B >TRUE</B ></TT >, then the sha1 digest is instead returned in raw binary format with a length of 20. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > The optional <CODE CLASS="parameter" >raw_output</CODE > parameter was added in PHP 5.0.0 and defaults to <TT CLASS="constant" ><B >FALSE</B ></TT > </P ></BLOCKQUOTE ></DIV ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN226778" ></A ><P ><B >例 1. A <B CLASS="function" >sha1()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$str </font><font color="#007700">= </font><font color="#DD0000">'apple'</font><font color="#007700">;<br /> <br />if (</font><font color="#0000BB">sha1</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">) === </font><font color="#DD0000">'d0be2dc421be4fcd0172e5afceea3970e2f3d940'</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"Would you like a green or red apple?"</font><font color="#007700">;<br /> exit;<br />}<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > See also <A HREF="function.sha1-file.html" ><B CLASS="function" >sha1_file()</B ></A >, <A HREF="function.crc32.html" ><B CLASS="function" >crc32()</B ></A >, and <A HREF="function.md5.html" ><B CLASS="function" >md5()</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.sha1-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.similar-text.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >sha1_file</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.strings.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >similar_text</TD ></TR ></TABLE ></DIV ></BODY ></HTML >