Remove all non-letter and non-digit characters from your header and then do a case-insensitive comparison. Something like 

$header =~ s/[^a-zA-Z0-9]//g;
if( $header =~ /header1|header2/i ) {
    ...

[download]

UPDATE: changed /I to /i

In reply to Re: Help with regex by hdb
in thread Help with regex by reaper9187

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