使用PHP发出HTTP / 2请求 [英] Make HTTP/2 request with PHP

问题描述

有没有一种方法可以强制PHP与另一台服务器建立HTTP2连接，以查看该服务器是否支持该服务器？

Is there a way to force PHP to make a HTTP2 connection to another server just to see if that server supports it?

我已经尝试过：

$options = stream_context_create(array(
               'http' => array(
                    'method' => 'GET',
                    'timeout' => 5,
                    'protocol_version' => 1.1
                )
              ));
$res = file_get_contents($url, false, $options);
var_dump($http_response_header);

并尝试：

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HTTP_VERSION, 3);
$response = curl_exec($ch);
var_dump($response);
curl_close($ch);

但是如果我使用以下URL https://www.google.com/#q=apache+2.5+http%2F2

But both ways give me a HTTP1.1 response if I use the following URL https://www.google.com/#q=apache+2.5+http%2F2

我正在从发送请求一个启用HTTP / 2 + SSL的域。我在做什么错？

I'm sending the request from a HTTP/2 + SSL enabled domain. What am I doing wrong?

推荐答案

据我所知，cURL是PHP中唯一支持HTTP的传输方法2.0。

As far as I'm aware, cURL is the only transfer method in PHP that supports HTTP 2.0.

您首先需要测试您的cURL版本是否可以支持它，然后设置正确的版本标头：

You'll first need to test that your version of cURL can support it, and then set the correct version header:

if (curl_version()["features"] & CURL_VERSION_HTTP2 !== 0) {
    $url = "https://www.google.com/";
    $ch = curl_init();
    curl_setopt_array($ch, [
        CURLOPT_URL            =>$url,
        CURLOPT_HEADER         =>true,
        CURLOPT_NOBODY         =>true,
        CURLOPT_RETURNTRANSFER =>true,
        CURLOPT_HTTP_VERSION   =>CURL_HTTP_VERSION_2_0,
    ]);
    $response = curl_exec($ch);
    if ($response !== false && strpos($response, "HTTP/2") === 0) {
        echo "HTTP/2 support!";
    } elseif ($response !== false) {
        echo "No HTTP/2 support on server.";
    } else {
        echo curl_error($ch);
    }
    curl_close($ch);
} else {
    echo "No HTTP/2 support on client.";
}

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