I don't know what \+ means?

That renders the regex metacharacter + to a literal "+" character to be matched in the string, as in ... 

# https://www.youtube.com/watch?v=iqu132vTl5Y
perl -e 'q[x+v] =~ m{\+} and print q[I saw the sign]'

[download]

In reply to Re^2: Move a file to another directory based on regex match by parv
in thread Move a file to another directory based on regex match by DAN0207

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