saveToAsciiSafeString(); echo ''.$appsecret.''; //Generate private/public keypair using openssl functions $key = openssl_pkey_new([ 'digest_alg' => 'aes256', 'private_key_type' => \OPENSSL_KEYTYPE_RSA, 'encrypt_key' => false, 'encrypt_key_cipher' => \OPENSSL_CIPHER_AES_256_CBC, ]); // export private key openssl_pkey_export($key, $priv_key); // export public key $keyData = openssl_pkey_get_details($key); $public_key = $keyData['key']; $private_key = $priv_key; echo ''.$public_key.''; echo ''.$private_key.''; ?>