支付宝PHP-RSA公钥和私钥的生成

/*
* 生成RSA私钥和公钥
* @success array privKey,pubKey
* */
public function pkey_new(){
$config = array(
"private_key_bits" => 1024,//位数
"private_key_type" => OPENSSL_KEYTYPE_RSA,
);
$res = openssl_pkey_new($config);
openssl_pkey_export($res, $privKey);//私钥
$pubKey = openssl_pkey_get_details($res);
$pubKey = $pubKey["key"];//公钥
return array('privKey'=>$privKey,'pubKey'=>$pubKey);
}