APC PowerChute Personal Edition EventLog File Parser

<?php
/* ----------------------------------------------------
PowerChute Personal Edition 3.0.2 EventLog File Parser
©2013 by (v) Vadym Gulyi | http://vady.kiev.ua/
-- credits:
   http://johnwbartlett.com/PowerChute.html
   http://www.seltron.net/apc/powerchute.php
   http://vady.kiev.ua/tweets/1106
-- license:
   GPL v2 - http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
---------------------------------------------------- */
$events = array(
    '172' => "Battery backup transferred to battery power due to overvoltage",
    '173' => "Battery backup transferred to battery power due to undervoltage",
    '174' => "Battery backup transferred to battery power due to blackout",
    '177' => "PowerChute causing PC to hibernate",
    '61451' => "Self-test Failed",
    '61452' => "Self-test Passed",
    '61453' => "Battery backup transferred to battery power due to electrical noise",
    '61455' => "Battery backup transferred to AC utility power",
    '61456' => "PowerChute not communicating with battery backup",
    '61459' => "Battery connected in the battery backup",
    '61460' => "UPS has been disconnected",
    '61465' => "PowerChute recommenced communicating with the battery backup",
    '61483' => "PowerChute not communicating with the battery backup while on battery power",
    '61501' => "PowerChute regained communication with the battery backup while on battery power"
);
$onbattery = array(
    '172' => true,
    '173' => true,
    '174' => true,
    '177' => false,
    '61453' => true,
    '61455' => false,
    '61456' => false,
//  '61459' => "Battery connected in the battery backup",
    '61460' => false,
    '61465' => false,
    '61483' => true,
    '61501' => true
);
function getmicrotime() {
    list($usec, $sec) = explode(" ",microtime());
    return ((float)$usec + (float)$sec);
}
$file = (!empty($_FILES['eventlog'])) ? $_FILES['eventlog']['tmp_name'] : 'C:\Program Files\PowerChute Personal Edition\eventlog.dat';
$html = '<html><head><title>PowerChute Personal Edition EventLog File Parser</title></head><body>';
if(file_exists($file)) {
    $timer = getmicrotime();
    setlocale(LC_ALL, 'ru_RU.CP1251', 'rus_RUS.CP1251', 'Russian_Russia.1251');
    $html .= '<table border="1" cellpadding="5" cellspacing="0"><tr><th scope="col">#</th><th scope="col">Date</th><th scope="col">&nbsp;</th><th scope="col">&nbsp;</th><th scope="col">On Battery?</th><th scope="col">Event</th></tr>';
    $nn = 1;
    foreach(array_chunk(array_slice(unpack("v*", "\0\0".file_get_contents($file)), 1),10) as $data) {
        $date = mktime($data[4], $data[5], $data[6], $data[1], $data[3], $data[0]);
        $timestamp = sprintf('<span title="%s">%s</span>', strftime("%A, %d %B %Y", $date)." @ ".date("H:i:s", $date), date("Y-m-d H:i:s", $date));
        $event = (isset($events[$data[8]])) ? $events[$data[8]] : 'Event #'.$data[8];
        $event = sprintf('<span title="EventID #%d">%s</span>', $data[8], $event);
        $unknown = sprintf('<span title="Duration: %s">%s</span>', date('i:s',$data[7]), $data[7]);
        $accuse = array_key_exists($data[8], $onbattery) ? ($onbattery[$data[8]]===true) ? 'Yes' : 'No' : 'N/A';
        $html .= sprintf('<tr valign="top"><td align="right">%s</td><td>%s</td><td>%s</td><td>%s</td><td>%s</td><td>%s</td></tr>', $nn++, $timestamp, $data[2], $unknown, $accuse, $event);
    }
    $html .= '</table>';
    echo $html;
    if($nn>1) printf("<p>%d total records parsed in %s seconds!</p>", $nn-1, (number_format(getmicrotime()-$timer,2)));
    else echo '<p>No data found in eventlog.dat.</p>';
} else {
    echo $html.'<form enctype="multipart/form-data" method="post" action="'.$_SERVER['PHP_SELF'].'"><label for="eventlog">Provide <strong>eventlog.dat</strong> file:</label><input type="file" name="eventlog" id="eventlog" /><input type="submit" value="Parse" /></form>';
}
echo '</body></html>';
?>