socket通信 php作为客户端，C++作为服务端通信有关问题。

<?php<br />error_reporting(E_ALL);<br />set_time_limit(0);<br />echo "<h2>TCP/IP Connection</h2>\n";<br /><br />$port = 6000;<br />$ip = "127.0.0.1";<br /><br /><br />$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);<br />if ($socket < 0) {<br />    echo "socket_create() failed: reason: " . socket_strerror($socket) . "\n";<br />}else {<br />    echo "OK.\n";<br />}<br /><br />echo "试图连接 '$ip' 端口 '$port'...\n";<br />$result = socket_connect($socket, $ip, $port);<br />if ($result < 0) {<br />    echo "socket_connect() failed.\nReason: ($result) " . socket_strerror($result) . "\n";<br />}else {<br />    echo "连接OK\n";<br />}<br /><br />$in = 'r';<br />$out ='';<br /><br />	if(!socket_write($socket,$in,strlen($in))) {<br />		echo "socket_write() failed: reason: " . socket_strerror($socket) . "\n";<br />	}else {<br />		<br />		echo "发送到服务器信息成功！\n";<br />		echo "发送的内容为:<font color='red'>$in</font> <br>";<br />		<br />	}<br /><br /><br />while($out = socket_read($socket,8192)) {<br />    //echo "接收服务器回传信息成功！\n";<br />	//$obj=json_decode($out); <br />    //echo "接受的内容为:",$out;<br />	echo $out;<br />	//echo $obj->0;<br />}<br /><br /><br />/*<br />if (false !== ($bytes = socket_recv($socket, $buf, 2048, MSG_WAITALL))) {<br />	echo 'aa'.$buf.'aa';<br />    echo "Read $bytes bytes from socket_recv(). Closing socket...";<br />} else {<br />    echo "socket_recv() failed; reason: " . socket_strerror(socket_last_error($socket)) . " ";<br />}<br />*/<br />echo "关闭SOCKET...\n";<br />socket_close($socket);<br />echo "关闭OK\n";<br />?>