Writes data from filename in to the current
position of large object.
如果成功则返回 TRUE,失败则返回 FALSE。
注:
In PHP versions before 5.0.0 you must use ocisavelobfile() instead.
This name still can be used, it was left as alias of
oci_lob_import() for downwards compatability.
This, however, is deprecated and not recommended.