The =~ operator applies the pattern on the right-hand side to the value on the left-hand side. This means the value on the left-hand side should be the line you are matching against. Try if($temp_line =~ /^REVISION_LOCATION:/)

Update: Added link

In reply to Re: Unable to use if condition inside foreach loop using perl? by haukex
in thread Unable to use if condition inside foreach loop using perl? by finddata

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