有没有办法强制PHP与另一台服务器建立HTTP2连接只是为了查看该服务器是否支持它?
我试过了:
$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);
并试过:
$ch = curl_init();
curl_setopt($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,如果我使用以下网址https://www.google.com/#q=apache 2.5 http / 2,这两种方式都会给我一个HTTP1.1响应
我正在从启用HTTP / 2 SSL的域发送请求.我究竟做错了什么?
解决方法:
据我所知,cURL是PHP中唯一支持HTTP 2.0的传输方法.
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:
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.";
}