about why the FileSize function in PHP returns warning

Source: Internet
Author: User

These days in learning PHP about the operation of the file section, learned FileSize, the function is to get the size of the file.


But when I was testing, I found that the warning returned to me, and I went to find the problem.


I found that the parameters in the FileSize function should be written on the path, relative path or absolute path, unless the file and script in the same directory, this time will not be warned.


Later I looked at a few other functions about file manipulation, and found the same situation as filesize.



I am purely small white, writing is not very good (at least personally feel very bad, organization not up language t_t)

about why the FileSize function in PHP returns warning

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