php中socket的使用

一、开启socket

phpinfo();查看是否开启了socket扩展，否则在php.ini中开启。

二、服务器端代码的写法
<?php
error_reporting(E_ALL);
set_time_limit(0);
//ob_implicit_flush();

$address = '127.0.0.1';
$port = 10005;
//创建端口
if( ($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
echo "socket_create() failed :reason:" . socket_strerror(socket_last_error()) . "/n";
}

//绑定
if (socket_bind($sock, $address, $port) === false) {
echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "/n";
}

//监听
if (socket_listen($sock, 5) === false) {
echo "socket_bind() failed :reason:" . socket_strerror(socket_last_error($sock)) . "/n";
}

do {
//得到一个链接
if (($msgsock = socket_accept($sock)) === false) {
echo "socket_accepty() failed :reason:".socket_strerror(socket_last_error($sock)) . "/n";
break;
}
//welcome 发送到客户端
$msg = "<font color='red'>server send:welcome</font><br/>";
socket_write($msgsock, $msg, strlen($msg));
echo 'read client message/n';
$buf = socket_read($msgsock, 8192);
$talkback = "received message:$buf/n";
echo $talkback;
if (false === socket_write($msgsock, $talkback, strlen($talkback))) {
echo "socket_write() failed reason:" . socket_strerror(socket_last_error($sock)) ."/n";
} else {
echo 'send success';
}
socket_close($msgsock);
} while(true);
//关闭socket
socket_close($sock);

?>

三、客户端
<?php
//error_reporting(E_ALL);
echo "<h2>tcp/ip connection </h2>/n";
$service_port = 10005;
$address = '127.0.0.1';

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "/n";
} else {
echo "OK. /n";
}

echo "Attempting to connect to '$address' on port '$service_port'...";
$result = socket_connect($socket, $address, $service_port);
if($result === false) {
echo "socket_connect() failed./nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "/n";
} else {
echo "OK /n";
}
$in = "HEAD / http/1.1/r/n";
$in .= "HOST: localhost /r/n";
$in .= "Connection: close/r/n/r/n";
$out = "";
echo "sending http head request ...";
socket_write($socket, $in, strlen($in));
echo "OK/n";

echo "Reading response:/n/n";
while ($out = socket_read($socket, 8192)) {
echo $out;
}
echo "closeing socket..";
socket_close($socket);
echo "ok ./n/n";