Encrypt then authenticate with ChaCha20-Poly1305

# sodium_crypto_aead_chacha20poly1305_encrypt

(PHP 7 >= 7.2.0, PHP 8)

sodium_crypto_aead_chacha20poly1305_encrypt — Encrypt then authenticate with ChaCha20-Poly1305

### Description

sodium_crypto_aead_chacha20poly1305_encrypt(
#[\SensitiveParameter] string `$message`,
string `$additional_data`,
string `$nonce`,
#[\SensitiveParameter] string `$key`
): string

Encrypt then authenticate with ChaCha20-Poly1305.

### Parameters

`message`
  The plaintext message to encrypt.
`additional_data`
  Additional, authenticated data. This is used in the verification of the authentication tag appended to the ciphertext, but it is not encrypted or stored in the ciphertext.
`nonce`
  A number that must be only used once, per message. 8 bytes long.
`key`
  Encryption key (256-bit).

### Return Values

Returns the ciphertext and tag on success, or `false` on failure.

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