The PHP variant of the driver requires PHP 5.4 or higher.
The HHVM variant of the driver requires HHVM 3.9 or higher.
The driver requires » OpenSSL and will rely on PHP to find its headers (i.e. PHP_SETUP_OPENSSL). If the build process fails to find OpenSSL, check that the OpenSSL development package (e.g. libssl-dev) and » pkg-config are both installed.
» Cyrus SASL is an optional dependency and will be used if available.