<head>
<?php
$fn = $_GET['fn'];
print "<title> $fn </title>\n";
print <<<HERE
</head>

<body>
<pre>
<code>
HERE;

$txt = file($fn);
foreach ($txt as $line) {
    for ($i=0; $i<strlen($line); $i++) {
        $line = rtrim($line);
        $c = substr($line, $i, 1);
        if ($c == '<') 
            print "&lt;";
        elseif ($c == '>')
            print "&gt;";
        elseif ($c == '&')
            print "&amp;";
        else
            print $c;
    }
    print "\n";
}
?>
</code>
</pre>
</body>
