Generate a random AES-256-GCM key

# sodium_crypto_aead_aes256gcm_keygen

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_aead_aes256gcm_keygen — Generate a random AES-256-GCM key

### Description

sodium_crypto_aead_aes256gcm_keygen(): string

Generate a random key for use with sodium_crypto_aead_aes256gcm_encrypt() and sodium_crypto_aead_aes256gcm_decrypt().

### Parameters

This function has no parameters.

### Return Values

Returns a 256-bit random key.

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