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

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><DIV
CLASS="reference"
><A
NAME="ref.sockets"
></A
><DIV
CLASS="TITLEPAGE"
><H1
CLASS="title"
>CLIV. Socket Functions</H1
><DIV
CLASS="PARTINTRO"
><A
NAME="AEN212409"
></A
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="sockets.intro"
>简介</A
></H1
><P
>&#13;     The socket extension implements a low-level interface to the socket
     communication functions based on the popular BSD sockets, providing the
     possibility to act as a socket server as well as a client.
    </P
><P
>&#13;     For a more generic client-side socket interface, see
     <A
HREF="function.stream-socket-client.html"
><B
CLASS="function"
>stream_socket_client()</B
></A
>, 
     <A
HREF="function.stream-socket-server.html"
><B
CLASS="function"
>stream_socket_server()</B
></A
>,
     <A
HREF="function.fsockopen.html"
><B
CLASS="function"
>fsockopen()</B
></A
>, and
     <A
HREF="function.pfsockopen.html"
><B
CLASS="function"
>pfsockopen()</B
></A
>.
    </P
><P
>&#13;     When using these functions, it is important to remember that while
     many of them have identical names to their C counterparts, they
     often have different declarations. Please be sure to read the
     descriptions to avoid confusion.
    </P
><P
>&#13;     Those unfamiliar with socket programming can find a lot
     of useful material in the appropriate Unix man pages, and there is a great
     deal of tutorial information on socket programming in C on the web, much
     of which can be applied, with slight modifications, to socket programming
     in PHP. The <A
HREF="http://www.developerweb.net/sock-faq/"
TARGET="_top"
>Unix Socket
     FAQ</A
> might be a good start.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
      本扩展已被移动到 <A
HREF="http://pecl.php.net"
TARGET="_top"
>PECL</A
> 库中且自以下版本起不再被绑定到 PHP 中：5.3.0.
     </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="sockets.requirements"
>需求</A
></H1
><P
>要编译本扩展模块无需外部库文件。</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="sockets.installation"
>安装</A
></H1
><P
>&#13;  The socket functions described here are part of an extension to
  PHP which must be enabled at compile time by giving the <CODE
CLASS="option"
>--enable-sockets</CODE
> option to
  <B
CLASS="command"
>configure</B
>.
 </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>IPv6 支持是 <TT
CLASS="literal"
>PHP 5.0.0</TT
> 新加的。</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="sockets.configuration"
>运行时配置</A
></H1
><P
>本扩展模块在 <TT
CLASS="filename"
>php.ini</TT
> 中未定义任何配置选项。</P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="sockets.resources"
>资源类型</A
></H1
><P
>&#13;     <A
HREF="function.socket-accept.html"
><B
CLASS="function"
>socket_accept()</B
></A
>,
     <A
HREF="function.socket-create-listen.html"
><B
CLASS="function"
>socket_create_listen()</B
></A
> and
     <A
HREF="function.socket-create.html"
><B
CLASS="function"
>socket_create()</B
></A
> return socket recources.
    </P
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="sockets.constants"
>预定义常量</A
></H1
><P
>以下常量由本扩展模块定义，因此只有在本扩展模块被编译到
PHP 中，或者在运行时被动态加载后才有效。</P
><P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><TT
CLASS="constant"
><B
>AF_UNIX</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>AF_INET</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>AF_INET6</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SOCK_STREAM</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SOCK_DGRAM</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SOCK_RAW</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SOCK_SEQPACKET</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SOCK_RDM</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>MSG_OOB</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>MSG_WAITALL</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>MSG_PEEK</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>MSG_DONTROUTE</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_DEBUG</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_REUSEADDR</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_KEEPALIVE</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_DONTROUTE</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_LINGER</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_BROADCAST</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_OOBINLINE</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_SNDBUF</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_RCVBUF</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_SNDLOWAT</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_RCVLOWAT</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_SNDTIMEO</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_RCVTIMEO</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_TYPE</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SO_ERROR</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SOL_SOCKET</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>PHP_NORMAL_READ</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>PHP_BINARY_READ</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SOL_TCP</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
><DT
><TT
CLASS="constant"
><B
>SOL_UDP</B
></TT
> 
    (<A
HREF="language.types.integer.html"
><B
CLASS="type"
>integer</B
></A
>)</DT
><DD
><P
>&#13;     
    </P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="sockets.errors"
>Socket Errors</A
></H1
><P
>&#13;     The socket extension was written to provide a usable interface to the
     powerful BSD sockets. Care has been taken that the functions work equally
     well on Win32 and Unix implementations. Almost all of the sockets
     functions may fail under certain conditions and therefore emit an
     <TT
CLASS="constant"
><B
>E_WARNING</B
></TT
> message describing the error. Sometimes this
     doesn't happen to the desire of the developer. For example the function
     <A
HREF="function.socket-read.html"
><B
CLASS="function"
>socket_read()</B
></A
> may suddenly emit an
     <TT
CLASS="constant"
><B
>E_WARNING</B
></TT
> message because the connection broke
     unexpectedly. It's common to suppress the warning with the
     <TT
CLASS="literal"
>@</TT
>-operator and catch the error code within the
     application with the <A
HREF="function.socket-last-error.html"
><B
CLASS="function"
>socket_last_error()</B
></A
> function. You
     may call the <A
HREF="function.socket-strerror.html"
><B
CLASS="function"
>socket_strerror()</B
></A
> function with this error
     code to retrieve a string describing the error. See their description for
     more information.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
      The <TT
CLASS="constant"
><B
>E_WARNING</B
></TT
> messages generated by the socket
      extension are in English though the retrieved error message will appear
      depending on the current locale (<TT
CLASS="constant"
><B
>LC_MESSAGES</B
></TT
>):
      <TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
Warning - socket_bind() unable to bind address [98]: Die Adresse wird bereits verwendet</font>
</code></TD
></TR
></TABLE
>
     </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="section"
><H1
CLASS="section"
><A
NAME="sockets.examples"
>范例</A
></H1
><P
>&#13;     <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN212658"
></A
><P
><B
>例 1. Socket example: Simple TCP/IP server</B
></P
><P
>&#13;       This example shows a simple talkback server. Change the
       <CODE
CLASS="varname"
>address</CODE
> and <CODE
CLASS="varname"
>port</CODE
> variables
       to suit your setup and execute. You may then connect to the
       server with a command similar to: <B
CLASS="command"
>telnet 192.168.1.53
       10000</B
> (where the address and port match your
       setup). Anything you type will then be output on the server
       side, and echoed back to you. To disconnect, enter 'quit'.
      </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
#!/usr/local/bin/php -q<br /><font color="#0000BB">&lt;?php<br />error_reporting</font><font color="#007700">(</font><font color="#0000BB">E_ALL</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Allow the script to hang around waiting for connections. */<br /></font><font color="#0000BB">set_time_limit</font><font color="#007700">(</font><font color="#0000BB">0</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Turn on implicit output flushing so we see what we're getting<br /> * as it comes in. */<br /></font><font color="#0000BB">ob_implicit_flush</font><font color="#007700">();<br /><br /></font><font color="#0000BB">$address </font><font color="#007700">= </font><font color="#DD0000">'192.168.1.53'</font><font color="#007700">;<br /></font><font color="#0000BB">$port </font><font color="#007700">= </font><font color="#0000BB">10000</font><font color="#007700">;<br /><br />if ((</font><font color="#0000BB">$sock </font><font color="#007700">= </font><font color="#0000BB">socket_create</font><font color="#007700">(</font><font color="#0000BB">AF_INET</font><font color="#007700">, </font><font color="#0000BB">SOCK_STREAM</font><font color="#007700">, </font><font color="#0000BB">SOL_TCP</font><font color="#007700">)) === </font><font color="#0000BB">false</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"socket_create() failed: reason: " </font><font color="#007700">. </font><font color="#0000BB">socket_strerror</font><font color="#007700">(</font><font color="#0000BB">socket_last_error</font><font color="#007700">()) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />}<br /><br />if (</font><font color="#0000BB">socket_bind</font><font color="#007700">(</font><font color="#0000BB">$sock</font><font color="#007700">, </font><font color="#0000BB">$address</font><font color="#007700">, </font><font color="#0000BB">$port</font><font color="#007700">) === </font><font color="#0000BB">false</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"socket_bind() failed: reason: " </font><font color="#007700">. </font><font color="#0000BB">socket_strerror</font><font color="#007700">(</font><font color="#0000BB">socket_last_error</font><font color="#007700">(</font><font color="#0000BB">$sock</font><font color="#007700">)) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />}<br /><br />if (</font><font color="#0000BB">socket_listen</font><font color="#007700">(</font><font color="#0000BB">$sock</font><font color="#007700">, </font><font color="#0000BB">5</font><font color="#007700">) === </font><font color="#0000BB">false</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"socket_listen() failed: reason: " </font><font color="#007700">. </font><font color="#0000BB">socket_strerror</font><font color="#007700">(</font><font color="#0000BB">socket_last_error</font><font color="#007700">(</font><font color="#0000BB">$sock</font><font color="#007700">)) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />}<br /><br />do {<br />&nbsp;&nbsp;&nbsp;&nbsp;if ((</font><font color="#0000BB">$msgsock </font><font color="#007700">= </font><font color="#0000BB">socket_accept</font><font color="#007700">(</font><font color="#0000BB">$sock</font><font color="#007700">)) === </font><font color="#0000BB">false</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"socket_accept() failed: reason: " </font><font color="#007700">. </font><font color="#0000BB">socket_strerror</font><font color="#007700">(</font><font color="#0000BB">socket_last_error</font><font color="#007700">(</font><font color="#0000BB">$sock</font><font color="#007700">)) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* Send instructions. */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$msg </font><font color="#007700">= </font><font color="#DD0000">"\nWelcome to the PHP Test Server. \n" </font><font color="#007700">.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">"To quit, type 'quit'. To shut down the server type 'shutdown'.\n"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">socket_write</font><font color="#007700">(</font><font color="#0000BB">$msgsock</font><font color="#007700">, </font><font color="#0000BB">$msg</font><font color="#007700">, </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$msg</font><font color="#007700">));<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;do {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if (</font><font color="#0000BB">false </font><font color="#007700">=== (</font><font color="#0000BB">$buf </font><font color="#007700">= </font><font color="#0000BB">socket_read</font><font color="#007700">(</font><font color="#0000BB">$msgsock</font><font color="#007700">, </font><font color="#0000BB">2048</font><font color="#007700">, </font><font color="#0000BB">PHP_NORMAL_READ</font><font color="#007700">))) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"socket_read() failed: reason: " </font><font color="#007700">. </font><font color="#0000BB">socket_strerror</font><font color="#007700">(</font><font color="#0000BB">socket_last_error</font><font color="#007700">(</font><font color="#0000BB">$msgsock</font><font color="#007700">)) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break </font><font color="#0000BB">2</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if (!</font><font color="#0000BB">$buf </font><font color="#007700">= </font><font color="#0000BB">trim</font><font color="#007700">(</font><font color="#0000BB">$buf</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;continue;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if (</font><font color="#0000BB">$buf </font><font color="#007700">== </font><font color="#DD0000">'quit'</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;if (</font><font color="#0000BB">$buf </font><font color="#007700">== </font><font color="#DD0000">'shutdown'</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">socket_close</font><font color="#007700">(</font><font color="#0000BB">$msgsock</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break </font><font color="#0000BB">2</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$talkback </font><font color="#007700">= </font><font color="#DD0000">"PHP: You said '$buf'.</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">socket_write</font><font color="#007700">(</font><font color="#0000BB">$msgsock</font><font color="#007700">, </font><font color="#0000BB">$talkback</font><font color="#007700">, </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$talkback</font><font color="#007700">));<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"$buf</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;} while (</font><font color="#0000BB">true</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">socket_close</font><font color="#007700">(</font><font color="#0000BB">$msgsock</font><font color="#007700">);<br />} while (</font><font color="#0000BB">true</font><font color="#007700">);<br /><br /></font><font color="#0000BB">socket_close</font><font color="#007700">(</font><font color="#0000BB">$sock</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
    </P
><P
>&#13;     <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN212666"
></A
><P
><B
>例 2. Socket example: Simple TCP/IP client</B
></P
><P
>&#13;       This example shows a simple, one-shot HTTP client. It simply
       connects to a page, submits a HEAD request, echoes the reply,
       and exits.
      </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />error_reporting</font><font color="#007700">(</font><font color="#0000BB">E_ALL</font><font color="#007700">);<br /><br />echo </font><font color="#DD0000">"&lt;h2&gt;TCP/IP Connection&lt;/h2&gt;\n"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">/* Get the port for the WWW service. */<br /></font><font color="#0000BB">$service_port </font><font color="#007700">= </font><font color="#0000BB">getservbyname</font><font color="#007700">(</font><font color="#DD0000">'www'</font><font color="#007700">, </font><font color="#DD0000">'tcp'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Get the IP address for the target host. */<br /></font><font color="#0000BB">$address </font><font color="#007700">= </font><font color="#0000BB">gethostbyname</font><font color="#007700">(</font><font color="#DD0000">'www.example.com'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Create a TCP/IP socket. */<br /></font><font color="#0000BB">$socket </font><font color="#007700">= </font><font color="#0000BB">socket_create</font><font color="#007700">(</font><font color="#0000BB">AF_INET</font><font color="#007700">, </font><font color="#0000BB">SOCK_STREAM</font><font color="#007700">, </font><font color="#0000BB">SOL_TCP</font><font color="#007700">);<br />if (</font><font color="#0000BB">$socket </font><font color="#007700">=== </font><font color="#0000BB">false</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"socket_create() failed: reason: " </font><font color="#007700">. </font><font color="#0000BB">socket_strerror</font><font color="#007700">(</font><font color="#0000BB">socket_last_error</font><font color="#007700">()) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />} else {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"OK.\n"</font><font color="#007700">;<br />}<br /><br />echo </font><font color="#DD0000">"Attempting to connect to '$address' on port '$service_port'..."</font><font color="#007700">;<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">socket_connect</font><font color="#007700">(</font><font color="#0000BB">$socket</font><font color="#007700">, </font><font color="#0000BB">$address</font><font color="#007700">, </font><font color="#0000BB">$service_port</font><font color="#007700">);<br />if (</font><font color="#0000BB">$result </font><font color="#007700">=== </font><font color="#0000BB">false</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"socket_connect() failed.</font><font color="#007700">\n</font><font color="#DD0000">Reason: ($result) " </font><font color="#007700">. </font><font color="#0000BB">socket_strerror</font><font color="#007700">(</font><font color="#0000BB">socket_last_error</font><font color="#007700">(</font><font color="#0000BB">$socket</font><font color="#007700">)) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />} else {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"OK.\n"</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">$in </font><font color="#007700">= </font><font color="#DD0000">"HEAD / HTTP/1.1\r\n"</font><font color="#007700">;<br /></font><font color="#0000BB">$in </font><font color="#007700">.= </font><font color="#DD0000">"Host: www.example.com\r\n"</font><font color="#007700">;<br /></font><font color="#0000BB">$in </font><font color="#007700">.= </font><font color="#DD0000">"Connection: Close\r\n\r\n"</font><font color="#007700">;<br /></font><font color="#0000BB">$out </font><font color="#007700">= </font><font color="#DD0000">''</font><font color="#007700">;<br /><br />echo </font><font color="#DD0000">"Sending HTTP HEAD request..."</font><font color="#007700">;<br /></font><font color="#0000BB">socket_write</font><font color="#007700">(</font><font color="#0000BB">$socket</font><font color="#007700">, </font><font color="#0000BB">$in</font><font color="#007700">, </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$in</font><font color="#007700">));<br />echo </font><font color="#DD0000">"OK.\n"</font><font color="#007700">;<br /><br />echo </font><font color="#DD0000">"Reading response:\n\n"</font><font color="#007700">;<br />while (</font><font color="#0000BB">$out </font><font color="#007700">= </font><font color="#0000BB">socket_read</font><font color="#007700">(</font><font color="#0000BB">$socket</font><font color="#007700">, </font><font color="#0000BB">2048</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#0000BB">$out</font><font color="#007700">;<br />}<br /><br />echo </font><font color="#DD0000">"Closing socket..."</font><font color="#007700">;<br /></font><font color="#0000BB">socket_close</font><font color="#007700">(</font><font color="#0000BB">$socket</font><font color="#007700">);<br />echo </font><font color="#DD0000">"OK.\n\n"</font><font color="#007700">;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
    </P
></DIV
></DIV
><DIV
CLASS="TOC"
><DL
><DT
><B
>目录</B
></DT
><DT
><A
HREF="function.socket-accept.html"
>socket_accept</A
>&nbsp;--&nbsp;Accepts a connection on a socket</DT
><DT
><A
HREF="function.socket-bind.html"
>socket_bind</A
>&nbsp;--&nbsp;Binds a name to a socket</DT
><DT
><A
HREF="function.socket-clear-error.html"
>socket_clear_error</A
>&nbsp;--&nbsp;Clears the error on the socket or the last error code</DT
><DT
><A
HREF="function.socket-close.html"
>socket_close</A
>&nbsp;--&nbsp;Closes a socket resource</DT
><DT
><A
HREF="function.socket-connect.html"
>socket_connect</A
>&nbsp;--&nbsp;Initiates a connection on a socket</DT
><DT
><A
HREF="function.socket-create-listen.html"
>socket_create_listen</A
>&nbsp;--&nbsp;Opens a socket on port to accept connections </DT
><DT
><A
HREF="function.socket-create-pair.html"
>socket_create_pair</A
>&nbsp;--&nbsp;Creates a pair of indistinguishable sockets and stores them in an array</DT
><DT
><A
HREF="function.socket-create.html"
>socket_create</A
>&nbsp;--&nbsp;Create a socket (endpoint for communication)</DT
><DT
><A
HREF="function.socket-get-option.html"
>socket_get_option</A
>&nbsp;--&nbsp;Gets socket options for the socket </DT
><DT
><A
HREF="function.socket-getpeername.html"
>socket_getpeername</A
>&nbsp;--&nbsp;
     Queries the remote side of the given socket which may either result in host/port
     or in a Unix filesystem path, dependent on its type
    </DT
><DT
><A
HREF="function.socket-getsockname.html"
>socket_getsockname</A
>&nbsp;--&nbsp;
     Queries the local side of the given socket which may either result in host/port
     or in a Unix filesystem path, dependent on its type
    </DT
><DT
><A
HREF="function.socket-last-error.html"
>socket_last_error</A
>&nbsp;--&nbsp;Returns the last error on the socket </DT
><DT
><A
HREF="function.socket-listen.html"
>socket_listen</A
>&nbsp;--&nbsp;Listens for a connection on a socket</DT
><DT
><A
HREF="function.socket-read.html"
>socket_read</A
>&nbsp;--&nbsp;Reads a maximum of length bytes from a socket</DT
><DT
><A
HREF="function.socket-recv.html"
>socket_recv</A
>&nbsp;--&nbsp;Receives data from a connected socket </DT
><DT
><A
HREF="function.socket-recvfrom.html"
>socket_recvfrom</A
>&nbsp;--&nbsp;Receives data from a socket, connected or not </DT
><DT
><A
HREF="function.socket-select.html"
>socket_select</A
>&nbsp;--&nbsp;
     Runs the select() system call on the given arrays of sockets 
     with a specified timeout
    </DT
><DT
><A
HREF="function.socket-send.html"
>socket_send</A
>&nbsp;--&nbsp;Sends data to a connected socket </DT
><DT
><A
HREF="function.socket-sendto.html"
>socket_sendto</A
>&nbsp;--&nbsp;Sends a message to a socket, whether it is connected or not </DT
><DT
><A
HREF="function.socket-set-block.html"
>socket_set_block</A
>&nbsp;--&nbsp;
     Sets blocking mode on a socket resource
    </DT
><DT
><A
HREF="function.socket-set-nonblock.html"
>socket_set_nonblock</A
>&nbsp;--&nbsp;Sets nonblocking mode for file descriptor fd </DT
><DT
><A
HREF="function.socket-set-option.html"
>socket_set_option</A
>&nbsp;--&nbsp;Sets socket options for the socket</DT
><DT
><A
HREF="function.socket-shutdown.html"
>socket_shutdown</A
>&nbsp;--&nbsp;Shuts down a socket for receiving, sending, or both</DT
><DT
><A
HREF="function.socket-strerror.html"
>socket_strerror</A
>&nbsp;--&nbsp;Return a string describing a socket error</DT
><DT
><A
HREF="function.socket-write.html"
>socket_write</A
>&nbsp;--&nbsp;Write to a socket</DT
></DL
></DIV
></DIV
></DIV
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