This should give you an example 

use strict; use warnings; 

my $inputtext="a multi\nline\nstring\nanother line\n"; 
print $inputtext; 

my $newText = replaceText($inputtext, 'line', 'xx');
print "\n\n".$newText; 

sub replaceText{

    my($inputText, my $regex, my $replacement)= @_;
    $inputText =~ s/$regex/$replacement/g; 
    return $inputText;

}

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In reply to Re: searching and replacing strings in a multi line variable by huck
in thread searching and replacing strings in a multi line variable by victorz22

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