预定义常量

下列常量由此扩展定义,且仅在此扩展编译入 PHP 或在运行时动态载入时可用。

YAC_VERSION (string )
YAC_MAX_KEY_LEN (int ): Max length of a key could be, it is 48 bytes.
YAC_MAX_VALUE_RAW_LEN (int )
YAC_MAX_RAW_COMPRESSED_LEN (int )
YAC_SERIALIZER_PHP (int ): Use php serialize as serializer
YAC_SERIALIZER_JSON (int ): Use json as serializer(requrie --enable-json)
YAC_SERIALIZER_IGBINARY (int ): Use igbinary as serializer(require --enable-igbinary)
YAC_SERIALIZER_MSGPACK (int ): Use msgpack as serializer(require --enable-msgpack)
YAC_SERIALIZER (string ): Which serialzier is yac used