使用PHP發出HTTP/2請求

Question

有沒有辦法強制PHP創建到另一臺服務器的HTTP2連接，以查看該服務器是否支持它？

我已經試過：

$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); 

並試圖：

$ch = curl_init(); 
curl_setopt($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); 

但這兩種方式給我一個HTTP1.1響應，如果我用下面的URL https://www.google.com/#q=apache+2.5+http%2F2

我從HTTP/2 + SSL啓用域發送請求。我究竟做錯了什麼？

Answer 1

據我所知，cURL是PHP中唯一支持HTTP 2.0的傳輸方法。

首先您需要測試你的捲曲的版本可以支持它，然後設置正確的版本標題：

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") === 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."; 
}