Generate CVS output for use with uMap

<?php

$url = "http://dmpop.dhcp.io/mejiro";
$photos = "photos";
$thumbnails = "tims";

function gps($coordinate, $hemisphere) {
    for ($i = 0; $i < 3; $i++) {
        $part = explode('/', $coordinate[$i]);
        if (count($part) == 1) {
        $coordinate[$i] = $part[0];
        } else if (count($part) == 2) {
        $coordinate[$i] = floatval($part[0])/floatval($part[1]);
        } else {
        $coordinate[$i] = 0;
        }
    }
    list($degrees, $minutes, $seconds) = $coordinate;
    $sign = ($hemisphere == 'W' || $hemisphere == 'S') ? -1 : 1;
    return $sign * ($degrees + $minutes/60 + $seconds/3600);
}

$files = glob($photos.DIRECTORY_SEPARATOR.'*.{jpg,jpeg,JPG,JPEG}', GLOB_BRACE);
$fileCount = count($files);

echo "lat,lon,thumbnail,photo\n";
for ($i=($fileCount-1); $i>=0; $i--) {
    $file = $files[$i];
	$photo_url = $url.DIRECTORY_SEPARATOR.$photos.DIRECTORY_SEPARATOR.basename($file);
	$thumbnail_url = $url.DIRECTORY_SEPARATOR.$photos.DIRECTORY_SEPARATOR.$thumbnails.DIRECTORY_SEPARATOR.basename($file);
	$filepath = pathinfo($file);
	$exif = exif_read_data($file);
	$lat = gps($exif["GPSLatitude"], $exif['GPSLatitudeRef']);
	$lon = gps($exif["GPSLongitude"], $exif['GPSLongitudeRef']);
	$exif = exif_read_data($file, 0, true);
	echo $lat.",".$lon.",".$thumbnail_url.",".$photo_url."\n";
}

?>