How can i get publickey from pem file which is created based on rsa 364. installed crypt(RSA.php) library still getting below error
Fatal error: Call to unde
My recommendation: don't use PEAR's Crypt_RSA but rather phpseclib's Crypt_RSA.
PEAR's Crypt_RSA isn't PKCS#1 compliant, meaning signatures or ciphertexst's generated with it are not going to be interoperable with other languages, it doesn't support passworded private keys, and hasn't been actively maintained for years.
More info on phpseclib:
http://phpseclib.sourceforge.net/