创建文件 server.php 内容如下

<?php

$filename = '/data/www/devil/tcp/server.txt';
$myfile = fopen($filename, "a+");
set_time_limit( 0 );
ob_implicit_flush();
$socket = socket_create( AF_INET, SOCK_STREAM, SOL_TCP );
socket_bind( $socket, '192.168.1.94', 11109 );
socket_listen($socket);
$acpt=socket_accept($socket);
echo "Acpt!\n";
while ( $acpt ) {
    $words=fgets(STDIN);
    socket_write($acpt,$words);
    $hear=socket_read($acpt,1024);
    echo $hear;
    fwrite($myfile, $hear);
    if("bye\r\n"==$hear){
        socket_shutdown($acpt);
        break;
    }
    usleep( 5000 );
}
socket_close($socket);

fclose($myfile);
?>

创建文件 client.php 内容如下

<?php

$filename = '/data/www/devil/tcp/client.txt';
$myfile = fopen($filename, "a+");

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$con=socket_connect($socket,'192.168.1.94',11109);
if(!$con){socket_close($socket);exit;}
echo "Link\n";
while($con){
        $hear=socket_read($socket,1024);
        echo $hear;
        fwrite($myfile, $hear);
        $words=fgets(STDIN);
        socket_write($socket,$words);
        if($words=="bye\r\n"){break;}
        usleep( 5000 );
}
socket_shutdown($socket);
socket_close($sock);

fclose($myfile);
?>

文件创建好后，修改 $filename 变量相对应自己系统的地址，写测试数据

192.168.1.94 ip改成自己服务器的或者本机ip

php server.php
php client.php

在 server.php 窗口输入 hello
回到 client.php 窗口可以马上看见 hello
当然在 client.php 窗口输入的内容在 server.php 窗口也可以马上看见