使用PHP复制或重命名命令时，src和dest路径应该是绝对路径还是相对路径？

I have a filestructure that looks like this:

Folder_1

  Folder_2

    phpfile1.php

  Folder_3

    Folder_4

       random_pic.jpg

    Folder_5.

What should be the src and dest paths if I wanna copy/move randompic.jpg from Folder 4 to Folder 5?

I've tried:

I thought this is how absolute path would look.

copy("/var/a/b/c/Folder_3/Folder_4/random_pic.jpg", "/var/a/b/c/Folder_3/Folder_5/random_pic.jpg") ;

relative to the last place it was, src relative to where the script is and dest relative to src.
```
copy("../Folder_3/Folder_4/random_pic.jpg", "../Folder_5/random_pic.jpg");
```

both src and dest paths relative to where php script is.

copy("../Folder_3/Folder_4/random_pic.jpg", "../Folder_3/Folder_5/random_pic.jpg");

All 3 returned PHP Warning ... Failed to open stream ... no such file or directory in ...

You should always only use absolute paths. You can read about why and how here : PHP - Failed to open stream : No such file or directory