Manual do PHP Referência das Funções Extensões para Criptografia OpenSSL Constantes pré-definidas Server Name Indication constants Version constants Key/Certificate parameters Server Name Indication constants OPENSSL_TLSEXT_SERVER_NAME (string) Whether SNI support is available or not. Note: This constant were added in 5.3.2 and requires PHP to be built with OpenSSL 0.9.8j or greater.