Generate SSL For Cpanel

Im trying to write somecode to generate the KEY and CSR myself from a file on the site that needs the SSL. Yet when i generate the KEY with my code and copy it into cpanel for the key i get a message that Cpanel cant determin the host for the key. So i was wondering if anyone knows anything about the code on how to generate the key and csr? I am trying with php with this code

Code:

$ssl_configargs = array(
"digest_alg" => "sha1",
"private_key_bits" => 1024,
"private_key_type" => OPENSSL_KEYTYPE_RSA,
"encrypt_key" => false
);
$dn = array(
   "countryName" => "US",
   "stateOrProvinceName" => "CA",
   "localityName" => "domain",
   "organizationName" => "place",
   "organizationalUnitName" => "23",
   "commonName" => "www.mydomain.com",
   "emailAddress" => "test@mydomain.com"
);

$numberofdays = "365";

$pkey = openssl_pkey_new( $ssl_configargs );
$csr = openssl_csr_new( $dn, $privkey, $ssl_configargs );
$sscert = openssl_csr_sign( $csr, null, $privkey, $numberofdays );

openssl_csr_export( $csr, $csrout );
openssl_x509_export( $sscert, $certout );
openssl_pkey_export( $privkey, $pkeyout);

Anyone have any suggestions?