- bin2hex: documentation ( source)
- pack: documentation ( source)
<?php
echo bin2hex(sodium_crypto_box_publickey_from_secretkey(pack('H*', '6A2CB91DA5FB77B12A99C0EB872F4CDF4566B25172C1163C7DA518730A6D0770'))) . "\n"; // IETF Draft
echo bin2hex(sodium_crypto_box_publickey_from_secretkey(pack('H*', '77076d0a7318a57d3c16c17251b26645df4c2f87ebc0992ab177fba51db92c2a'))) . "\n"; // IETF RFC