(PHP 8 >= 8.1.0)
sodium_crypto_core_ristretto255_sub — Subtracts an element
Subtracts an element q from p.
Available as of libsodium 1.0.18.
本函数还未编写文档，仅有参数列表。
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));
?>以上示例会输出：
bool(true)