This is wrong: $filename =s[_(\d+).jpg$][_$md5.jpg];

You mean =~, not =. That fixes the error mentioning $_ (s/// works on $_ by default).

Also, the Perlish way to loop over an interval like that is for my $i (0..3) {.

In reply to Re^7: Renaming an image file by Anonymous Monk
in thread Renaming an image file by Anonymous Monk

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