php 通过 socket 实现一个 ping 的逻辑，可用于检测 ip 端口，上代码 ～

function ping($ip, $port)
{
    $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
    socket_set_nonblock($socket);
    socket_connect($socket,$ip, $port);
    socket_set_block($socket);

    $read = array($socket);
    $write = array($socket);
    $except = array($socket);
    // 设置超时，这里是关键，不是设置超时的话，程序会被阻塞
    // https://www.php.net/manual/zh/function.socket-select.php
    $status = socket_select($read, $write, $except, 1);

    return $status;
}

Just so so ~