php use not allowed,PHP Curl - Received HTTP/0.9 when not allowed

问题

I stumbled over a weird behavior when I try to send a post HTTP/2.0 request to apples push service:

$http2ch = curl_init();

curl_setopt($http2ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2_0);

curl_setopt($http2ch, CURLOPT_URL, 'https://api.push.apple.com/3/device/megauniquedevicetokendummy');

curl_setopt($http2ch, CURLOPT_PORT, 443);

curl_setopt($http2ch, CURLOPT_HTTPHEADER, $httpHeader);

curl_setopt($http2ch, CURLOPT_POST, true);

curl_setopt($http2ch, CURLOPT_POSTFIELDS, $body);

curl_setopt($http2ch, CURLOPT_RETURNTRANSFER, true);

curl_setopt($http2ch, CURLOPT_TIMEOUT, 30);

curl_setopt($http2ch, CURLOPT_HEADER, 1);

$result = curl_exec($http2ch);

if ($result === false) {

throw new \Exception("Curl failed: " . curl_error($http2ch) . " | " . curl_getinfo($http2ch, CURLINFO_HT