Returns the data from the specified location in the database. The row_number parameter must be between zero and the total number of rows minus one (0..filepro_rowcount() - 1). Likewise, field_number accepts values between zero and the total number of fields minus one (0..filepro_fieldcount() - 1)
注: 当 安全模式（safe mode） 被激活，PHP 将检查您将要操作的文件或者目录与正在执行的脚本是否有相同的 UID。