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PHP: Remove useless parts from filename

I have a list of files (in array):

C:\Data\..\Users\admin\history.dat
C:\\Users\admin\..\user\history.dat
C:\Users\..\Data\debug.log

How can I remove unnecessary parts, so the list will look like this:

C:\Users\admin\history.dat
C:\Users\user\history.dat
C:\Data\debug.log

使用realpath()函数...

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