xyzshop/test/examples/runtime/select.php

<?php
go(function () {
    Swoole\Runtime::enableCoroutine();

    $fp1 = stream_socket_client("tcp://www.baidu.com:80", $errno, $errstr, 30);
    $fp2 = stream_socket_client("tcp://www.qq.com:80", $errno, $errstr, 30);
    if (!$fp1) {
        echo "$errstr ($errno)<br />\n";
    } else {
        fwrite($fp1, "GET / HTTP/1.0\r\nHost: www.baidu.com\r\nUser-Agent: curl/7.58.0\r\nAccept: */*\r\n\r\n");
        $r_array = [$fp1, $fp2];
        $w_array = $e_array = null;
        $n = stream_select($r_array, $w_array, $e_array, 10);
        var_dump($r_array, $n);
        $html = '';
        while (!feof($fp1)) {
            $html .= fgets($fp1, 1024);
        }
        var_dump(strlen($html));
        fclose($fp1);
    }
});

swoole_event_wait();