(PHP 8 >= 8.1.0)
sodium_crypto_core_ristretto255_sub — Subtracts an element
$p, string $q): string
Subtracts an element q from p.
Available as of libsodium 1.0.18.
本函數還未編寫(xiě)文檔，僅有參數列表。
pAn element.
qAn element.
Returns a 32-byte random string.
示例 #1 sodium_crypto_core_ristretto255_sub() example
<?php
$foo = sodium_crypto_core_ristretto255_random();
$bar = sodium_crypto_core_ristretto255_random();
$value = sodium_crypto_core_ristretto255_add($foo, $bar);
$value = sodium_crypto_core_ristretto255_sub($value, $bar);
var_dump(hash_equals($foo, $value));
?>
以上例程會(huì )輸出：
bool(true)