Detect TLS version with PHP or command line?

JAB Creations

• September 06, 2025 04:32

For PHP to have the $_SERVER['SSL_PROTOCOL'] key/value Apache must have SSLOptions +StdEnvVars set in the .htaccess file but this no longer works, eh.

I went looking around and this guy suggests using the following command:

grep SSLProtocol /etc/httpd/conf.d/ssl.conf

Well, I had to go searching for the ssl.conf file and there are...a lot:

find / -name '*ssl.conf*' 2>/dev/null

So I tried the following:

grep SSLProtocol /etc/dovecot/ssl.conf
grep SSLProtocol /etc/apache2/conf.modules.d/495_mod_ssl.conf

Those commands returned empty results.

So, simply put: how do I detect the TLS version being used on the server using PHP or the command line please?

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  quietFinn

  • September 07, 2025 01:30

  try:
  grep -i -R SSLProtocol /etc/*

   

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  JAB Creations

  • September 08, 2025 00:11

  QF, thank you. This is an okay fall-back suggestion however I can't act on it since I don't have a second server to test dumbs*** updates by the OS and cPanel first. Last year I lost a month of my life after a forced migration! So I'm filing this one for future employees to deal with.

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