(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_aead_aes256gcm_keygen — Generate a random AES-256-GCM key
Generate a random key for use with sodium_crypto_aead_aes256gcm_encrypt() and sodium_crypto_aead_aes256gcm_decrypt().
This function has no parameters.
Returns a 256-bit random key.