PHP开发者检测是否支持TLS v1.2的代码是什么

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "https://www.howsmyssl.com/a/check");
curl_setopt($ch, CURLOPT_SSLVERSION, 6);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);
$tlsVer = json_decode($response, true);
echo "
Your TLS version is: " . ( $tlsVer['tls_version'] ? $tlsVer['tls_version'] : 'no TLS support' ) . "
";

Python 2.x:
$ python -c "import urllib2; print(urllib2.urlopen('https://tlstest.paypal.com/').read())"
Python 3.x:
$ python -c "import urllib.request; print(urllib.request.urlopen('https://tlstest.paypal.com/').read())"

node -e "var https = require('https'); https.get('https://tlstest.paypal.com/', function(res){ console.log(res.statusCode) });"