(PHP 4 >= 4.0.6, PHP 5)
fbsql_field_seek — Set result pointer to a specified field offset
Seeks to the specified field offset. If the next call to fbsql_fetch_field() doesn't include a field offset, the field offset specified in fbsql_field_seek() will be returned.
由 fbsql_query() 或 fbsql_db_query() 返回的结果标识符
The numerical offset of the field. The field index starts at 0.
成功时返回 TRUE， 或者在失败时返回 FALSE.