如何在PHP中连接不同端口的套​​接字？

Question

这段代码运行良好。 我在系统中的端口：80 中成功测试了套接字连接，但无法在不同的端口中连接。

<?php
echo "<pre>";
error_reporting(E_ALL);

echo "<h2>TCP/IP Connection</h2>\n";

/* Get the port for the WWW service. */
$service_port = 8000;

/* Get the IP address for the target host. */
$address = gethostbyname('localhost');

/* Create a TCP/IP socket. */
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($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";
}


echo "Closing socket...";
socket_close($socket);
echo "OK.\n\n";

?>

输出：

Attempting to connect to '127.0.0.1' on port '8000'...socket_connect() failed.
Reason: () Connection refused
Closing socket...OK.

我需要连接到 80 以外的端口，请问有什么想法吗？ 谢谢

Answer 1

如果没有打开服务器套接字，则无法连接到通用端口。