title: Decrypting a A256GCM-encrypted JWT in PHP
body: <p>so i'm trying to decrypt a JWT (that i get in context of "German Post-ID") in PHP and i've tried a couple of libraries for that, mainly '<a href="https://github.com/firebase/php-jwt" rel="nofollow noreferrer">firebase/php-jwt</a>' as its some easy to use library with a decryption-function.</p>
  
  <p>Unfortunately it doesn't support A256GCM-algorithm so i ended up with '<a href="https://github.com/Spomky-Labs/jose" rel="nofollow noreferrer">spomky-labs/jose</a>', but it seems to not support decrypting and i'm starting to believe that PHP is quiet uncommon to decrypt JWT's (unfortunately im bound to use PHP).
  Does someone have experience with this kind of JWT and / or have a recommendation for a working library?</p>
  
  <p>Thanks in advance for any answers and, since it's my first post, feel free to leave any suggestions how i could make my posts better.</p>