(PHP 3, PHP 4 , PHP 5)
This reads and verifies the map file, storing the field count and info.
No locking is done, so you should avoid modifying your filePro database while it may be opened in PHP.
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。