#!/usr/bin/perl

my $file = '/path/to/some/file';
open FILE, ">$file" or die_nice( "Could not open $file, Reason $!\n" );
print FILE "Woo-hoo!";
close FILE;
print header(), "<h2>Wrote $file OK</h2>";

sub die_nice( print header(), shift; exit }

sub header { return "Content-type: text/html\n\n" }