使用PHP发送TCP消息

<?php
// 创建TCP套接字
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
    echo "Failed to create socket: " . socket_strerror(socket_last_error()) . "\n";
    exit;
}

// 连接到目标主机和端口
$host = '目标主机IP地址';
$port = 目标端口号;
$result = socket_connect($socket, $host, $port);
if ($result === false) {
    echo "Failed to connect: " . socket_strerror(socket_last_error($socket)) . "\n";
    exit;
}

// 发送消息
$message = "Hello, TCP!";
$result = socket_write($socket, $message, strlen($message));
if ($result === false) {
    echo "Failed to send message: " . socket_strerror(socket_last_error($socket)) . "\n";
    exit;
}

// 关闭套接字
socket_close($socket);
?>