(PECL paradox >= 1.0.0)
px_open_fp — Open paradox database
$pxdoc
, resource $file
) : boolOpen an existing paradox database file. The actual file has to be opened before with fopen(). This function can also be used to open primary index files and tread them like a paradox database. This is supported for those who would like to investigate a primary index. It cannot be used to accelerate access to a database file.
成功时返回 TRUE， 或者在失败时返回 FALSE。