socket 例子

socket.php

<?php
error_reporting(E_ALL);
set_time_limit(0);
//ob_implicit_flush();

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

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

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

do {
    //得到一個鏈接
    if (($msgsock = socket_accept($sock)) === false) {
        echo "socket_accepty() failed :reason:".socket_strerror(socket_last_error($sock)) . "\n";
        break;
    }
    //welcome  發送到客戶端
    $msg = "<font color='red'>server send:welcome</font><br/>";
    socket_write($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);
//關閉socket
socket_close($sock);
?>

company.php 

<?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";