<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >stream_socket_enable_crypto</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="Stream Functions" HREF="ref.stream.html"><LINK REL="PREVIOUS" TITLE="stream_socket_client" HREF="function.stream-socket-client.html"><LINK REL="NEXT" TITLE="stream_socket_get_name" HREF="function.stream-socket-get-name.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.stream-socket-client.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.stream-socket-get-name.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.stream-socket-enable-crypto" ></A >stream_socket_enable_crypto</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN223784" ></A ><P > (PHP 5 >= 5.1.0RC1)</P >stream_socket_enable_crypto -- Turns encryption on/off on an already connected socket </DIV ><DIV CLASS="refsect1" ><A NAME="AEN223787" ></A ><H2 >Description</H2 >mixed <B CLASS="methodname" >stream_socket_enable_crypto</B > ( resource stream, bool enable [, int crypto_type [, resource session_stream]] )<BR ></BR ><P > When called with the <CODE CLASS="parameter" >crypto_type</CODE > parameter, <B CLASS="function" >stream_socket_enable_crypto()</B > will setup encryption on the stream using the specified method. </P ><P > Valid values for <CODE CLASS="parameter" >crypto_type</CODE > <P ></P ><UL ><LI ><P ><TT CLASS="constant" ><B >STREAM_CRYPTO_METHOD_SSLv2_CLIENT</B ></TT ></P ></LI ><LI ><P ><TT CLASS="constant" ><B >STREAM_CRYPTO_METHOD_SSLv3_CLIENT</B ></TT ></P ></LI ><LI ><P ><TT CLASS="constant" ><B >STREAM_CRYPTO_METHOD_SSLv23_CLIENT</B ></TT ></P ></LI ><LI ><P ><TT CLASS="constant" ><B >STREAM_CRYPTO_METHOD_TLS_CLIENT</B ></TT ></P ></LI ><LI ><P ><TT CLASS="constant" ><B >STREAM_CRYPTO_METHOD_SSLv2_SERVER</B ></TT ></P ></LI ><LI ><P ><TT CLASS="constant" ><B >STREAM_CRYPTO_METHOD_SSLv3_SERVER</B ></TT ></P ></LI ><LI ><P ><TT CLASS="constant" ><B >STREAM_CRYPTO_METHOD_SSLv23_SERVER</B ></TT ></P ></LI ><LI ><P ><TT CLASS="constant" ><B >STREAM_CRYPTO_METHOD_TLS_SERVER</B ></TT ></P ></LI ></UL > </P ><P > Once the crypto settings are established, cryptography can be turned on and off dynamically by passing <TT CLASS="constant" ><B >TRUE</B ></TT > or <TT CLASS="constant" ><B >FALSE</B ></TT > in the <CODE CLASS="parameter" >enable</CODE > parameter. </P ><P > If this stream should be seeded with settings from an already established crypto enabled stream, pass that stream's resource variable in the fourth parameter. </P ><P > Returns <TT CLASS="constant" ><B >TRUE</B ></TT > on success, <TT CLASS="constant" ><B >FALSE</B ></TT > if negotiation has failed or <TT CLASS="literal" >0</TT > if there isn't enough data and you should try again (only for non-blocking sockets). </P ><TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN223843" ></A ><P ><B >例 1. <B CLASS="function" >stream_socket_enable_crypto()</B > Example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$fp </font><font color="#007700">= </font><font color="#0000BB">stream_socket_client</font><font color="#007700">(</font><font color="#DD0000">"tcp://myproto.example.com:31337"</font><font color="#007700">, </font><font color="#0000BB">$errno</font><font color="#007700">, </font><font color="#0000BB">$errstr</font><font color="#007700">, </font><font color="#0000BB">30</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$fp</font><font color="#007700">) {<br /> die(</font><font color="#DD0000">"Unable to connect: $errstr ($errno)"</font><font color="#007700">);<br />}<br /></font><font color="#FF8000">/* Turn on encryption for login phase */<br /></font><font color="#0000BB">stream_socket_enable_crypto</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#0000BB">true</font><font color="#007700">, </font><font color="#0000BB">STREAM_CRYPTO_METHOD_SSLv23_CLIENT</font><font color="#007700">);<br /></font><font color="#0000BB">fwrite</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#DD0000">"USER god\r\n"</font><font color="#007700">);<br /></font><font color="#0000BB">fwrite</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#DD0000">"PASS secret\r\n"</font><font color="#007700">);<br /></font><font color="#FF8000">/* Turn off encryption for the rest */<br /></font><font color="#0000BB">stream_socket_enable_crypto</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">, </font><font color="#0000BB">false</font><font color="#007700">);<br />while (</font><font color="#0000BB">$motd </font><font color="#007700">= </font><font color="#0000BB">fgets</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">)) {<br /> echo </font><font color="#0000BB">$motd</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">fclose</font><font color="#007700">(</font><font color="#0000BB">$fp</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ><P > <A HREF="ref.openssl.html" >参考 CXII, <I >OpenSSL Functions</I ></A >, and <A HREF="transports.html" >附录 P</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.stream-socket-client.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.stream-socket-get-name.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >stream_socket_client</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.stream.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >stream_socket_get_name</TD ></TR ></TABLE ></DIV ></BODY ></HTML >