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(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_stream — Generate a deterministic sequence of bytes from a seed
$length, string $nonce, string $key): string
Generate a deterministic sequence of bytes from a seed, using the XSalsa20 stream cipher.
length
The number of bytes to return.
nonce
A number that must be only used once, per message. 24 bytes long. This is a large enough bound to generate randomly (i.e. random_bytes()).
key
Encryption key (256-bit).
String of pseudorandom bytes.
