PHP实现异步的三种方式

sleep(8);
$data = "--- type " . date("Y-m-d H:i:s") . " ---\\n";
file_put_contents("../log.txt", $data, FILE_APPEND);

pclose(popen("php exec.php &", 'r'));
echo 1;

function asyncCurl($url, $data)
{
    if (is_array($data)) {
        $data = http_build_query($data, null, '&');
    }
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
    curl_setopt($ch, CURLOPT_TIMEOUT, 1);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $result['response'] = curl_exec($ch);
    $result['httpCode'] = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    return $result;
}

$url = "<http://127.0.0.1/exec.php>";
$data = [];

asyncCurl($url, $data);

echo "OK";

function sockPost($host, $url, $param)
{
    $port = parse_url($url, PHP_URL_PORT);
    $port = $port ? $port : 80;
    $scheme = parse_url($url, PHP_URL_SCHEME);
    $path = parse_url($url, PHP_URL_PATH);
    $query = http_build_query($param);

    if ($scheme == 'https') {
        $host = 'ssl://' . $host;
    }
    $fp = fsockopen($host, $port, $error_code, $error_msg, 1);
    if (!$fp) {
        return array('error_code' => $error_code, 'error_msg' => $error_msg);
    } else {
        stream_set_blocking($fp, 0);
        stream_set_timeout($fp, 10);
        $header = "GET $path" . "?" . "$query" . " HTTP/1.1\\r\\n";
        $header .= "Host: $host\\r\\n";
        $header .= "Connection: close\\r\\n\\r\\n";//长连接关闭
        fwrite($fp, $header);
        usleep(2000); // 延时，防止在nginx服务器上无法执行成功
        fclose($fp);
        return array('error_code' => 0);
    }
}

$host = "127.0.0.1";
$url = "/exec.php";
$param = [];
$result = sockPost($host, $url, $param);
var_dump($result);