(PHP 8 >= 8.1.0)
sodium_crypto_core_ristretto255_is_valid_point — Determines if a point on the ristretto255 curve
$s): boolDetermines if a point on the ristretto255 curve, in canonical form, on the main subgroup, and that the point doesn't have a small order. Available as of libsodium 1.0.18.
本函数还未编写文档，仅有参数列表。
sAn Elliptic-curve point.
Returns true if s is on the ristretto255 curve, false otherwise.
示例 #1 sodium_crypto_core_ristretto255_is_valid_point() example
<?php
$foo = sodium_crypto_core_ristretto255_scalar_random();
$bar = sodium_crypto_scalarmult_ristretto255_base($foo);
var_dump(sodium_crypto_core_ristretto255_is_valid_point($bar));
?>以上示例会输出：
bool(true)