(PHP 4, PHP <=5.2.0)
ifx_blobinfile_mode — Set the default blob mode for all select queries
Set the default blob mode for all select queries.
Mode "0" means save Byte-Blobs in memory, and mode "1" means save Byte-Blobs in a file.
成功时返回 TRUE, 或者在失败时返回 FALSE.