(PHP 7 >= 7.2.0, PHP 8)
sodium_crypto_sign_publickey — Extract the Ed25519 public key from a keypair
sodium_crypto_sign_publickey(#[\SensitiveParameter] string $key_pair): string
Extract the Ed25519 public key from a keypair
key_pairEd25519 keypair (see: sodium_crypto_sign_keypair())
Ed25519 public key
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https://www.php.net/manual/en/function.sodium-crypto-sign-publickey.php