The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.
MONGO_STREAMS
     (integer)
    MONGO_SUPPORTS_STREAMS
     
    MONGO_SUPPORTS_STREAMS
     (integer)
    MONGO_SUPPORTS_SSL
     (integer)
    MONGO_SUPPORTS_AUTH_MECHANISM_MONGODB_CR
     (integer)
    MONGO_SUPPORTS_AUTH_MECHANISM_MONGODB_X509
     (integer)
    MONGO_SUPPORTS_AUTH_MECHANISM_GSSAPI
     (integer)
    MONGO_SUPPORTS_AUTH_MECHANISM_PLAIN
     (integer)
    MONGO_STREAM_NOTIFY_TYPE_IO_INIT
     (integer)
    MONGO_STREAM_NOTIFY_TYPE_LOG
     (integer)
    MONGO_STREAM_NOTIFY_IO_READ
     (integer)
    MONGO_STREAM_NOTIFY_IO_WRITE
     (integer)
    MONGO_STREAM_NOTIFY_IO_PROGRESS
     (integer)
    MONGO_STREAM_NOTIFY_IO_COMPLETED
     (integer)
    MONGO_STREAM_NOTIFY_LOG_INSERT
     (integer)
    MONGO_STREAM_NOTIFY_LOG_QUERY
     (integer)
    MONGO_STREAM_NOTIFY_LOG_UPDATE
     (integer)
    MONGO_STREAM_NOTIFY_LOG_DELETE
     (integer)
    MONGO_STREAM_NOTIFY_LOG_GETMORE
     (integer)
    MONGO_STREAM_NOTIFY_LOG_KILLCURSOR
     (integer)
    MONGO_STREAM_NOTIFY_LOG_BATCHINSERT
     (integer)
    MONGO_STREAM_NOTIFY_LOG_RESPONSE_HEADER
     (integer)
    MONGO_STREAM_NOTIFY_LOG_WRITE_REPLY
     (integer)
    MONGO_STREAM_NOTIFY_LOG_CMD_INSERT
     (integer)
    MONGO_STREAM_NOTIFY_LOG_CMD_UPDATE
     (integer)
    MONGO_STREAM_NOTIFY_LOG_CMD_DELETE
     (integer)
    MONGO_STREAM_NOTIFY_LOG_WRITE_BATCH
     (integer)