(PHP 4, PHP <=5.2.0)
ifx_blobinfile_mode — Set the default blob mode for all select queries
$mode
   )Set the default blob mode for all select queries.
modeMode "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。