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(PHP 8 >= 8.1.0)
sodium_crypto_core_ristretto255_scalar_sub — Subtracts a scalar value
$x, string $y): string
Subtracts a scalar y from x.
Available as of libsodium 1.0.18.
本函数还未编写文档，仅有参数列表。
x
Scalar, representing the X coordinate.
y
Scalar, representing the Y coordinate.
Returns a 32-byte random string.
示例 #1 sodium_crypto_core_ristretto255_scalar_sub() example
<?php
$foo = sodium_crypto_core_ristretto255_scalar_random();
$bar = sodium_crypto_core_ristretto255_scalar_random();
$value = sodium_crypto_core_ristretto255_scalar_add($foo, $bar);
$value = sodium_crypto_core_ristretto255_scalar_sub($value, $bar);
var_dump(hash_equals($foo, $value));
?>
以上例程会输出：
bool(true)
