LI. mailparse functions

I found the mailparse functions at 
.  It came with a file called "try.php" which gave some usefull
information on how to use these functions.  I've pasted the contents of
the file below:

<?php
/*
 * This is a simple email viewer.
 * make sure that $filename points to a file containing an email message
and
 * load this page in your browser.
 * You will be able to choose a part to view.
 * */

#$filename = "/home/CLIENTWEB/worlddo/mimetests/namib.rfc822";
$filename = "/home/CLIENTWEB/worlddo/mimetests/uumsg";
#$filename = "/home/CLIENTWEB/worlddo/mimetests/segblob.txt";
#$filename = "yourmessage.txt";

/* parse the message and return a mime message resource */
$mime = mailparse_msg_parse_file($filename);
/* return an array of message parts - this contsists of the names of the
parts
 * only */
$struct = mailparse_msg_get_structure($mime);

echo "<table>\n";
/* print a choice of sections */
foreach($struct as $st) {
        echo "<tr>\n";
        echo "<td><a
href=\"$PHP_SELF?showpart=$st\">$st</a></td>\n";
        /* get a handle on the message resource for a subsection */
        $section = mailparse_msg_get_part($mime, $st);
        /* get content-type, encoding and header information for that
section */
        $info = mailparse_msg_get_part_data($section);
        echo "\n";
        echo "<td>" . $info["content-type"] .
"</td>\n";
        echo "<td>" .
$info["content-disposition"] . "</td>\n";
        echo "<td>" .
$info["disposition-filename"] . "</td>\n";
        echo "<td>" . $info["charset"] .
"</td>\n";
        echo "</tr>";
}
echo "</table>";

/* if we were called to display a part, do so now */
if ($showpart)  {
        /* get a handle on the message resource for the desired part */
        $sec = mailparse_msg_get_part($mime, $showpart);

        echo "<table border=1><tr><th>Section
$showpart</th></tr><tr><td>";
        ob_start();
        /* extract the part from the message file and dump it to the
output buff
er
         * */
        mailparse_msg_extract_part_file($sec, $filename);
        $contents = ob_get_contents();
        ob_end_clean();
        /* quote the message for safe display in a browser */
        echo nl2br(htmlentities($contents)) .
"</td></tr></table>";;
}
?>