<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >base64_decode</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="URL 函数" HREF="ref.url.html"><LINK REL="PREVIOUS" TITLE="URL 函数" HREF="ref.url.html"><LINK REL="NEXT" TITLE="base64_encode" HREF="function.base64-encode.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="ref.url.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.base64-encode.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.base64-decode" ></A >base64_decode</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN235637" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >base64_decode -- 对使用 MIME base64 编码的数据进行解码</DIV ><DIV CLASS="refsect1" ><A NAME="AEN235640" ></A ><H2 >说明</H2 >string <B CLASS="methodname" >base64_decode</B > ( string encoded_data )<BR ></BR ><P > <B CLASS="function" >base64_decode()</B > 对 <CODE CLASS="parameter" >encoded_data</CODE > 进行解码,返回原始数据,失败则返回 <TT CLASS="constant" ><B >FALSE</B ></TT >。返回的数据可能是二进制的。 </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN235653" ></A ><P ><B >例 1. <B CLASS="function" >base64_decode()</B > 示例</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$str </font><font color="#007700">= </font><font color="#DD0000">'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw=='</font><font color="#007700">;<br />echo </font><font color="#0000BB">base64_decode</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P > 此示例将显示: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >This is an encoded string</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > 参见 <A HREF="function.base64-encode.html" ><B CLASS="function" >base64_encode()</B ></A > 和 <A HREF="http://www.faqs.org/rfcs/rfc2045" TARGET="_top" >RFC 2045</A > 的 6.8 章节。 </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="ref.url.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.base64-encode.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >URL 函数</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.url.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >base64_encode</TD ></TR ></TABLE ></DIV ></BODY ></HTML >