dbase_open() opens a dBase database with the given access mode.
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注: This function is affected by open_basedir.
The name of the database. It can be a relative or absolute path to the file where dBase will store your data.
An integer which correspond to those for the open() system call (Typically 0 means read-only, 1 means write-only, and 2 means read and write).
注: You can't open a dBase file in write-only mode as the function will fail to read the headers information and thus you can't use 1 as mode.