<?php
require_once('pel-0.9.1/PelJpeg.php');
$jpeg = new PelJpeg("a.jpg");
$ifd0 = $jpeg->getExif()->getTiff()->getIfd();
if (!$ifd0->getSubIfd(PelIfd::GPS)) {
	$gps = new PelIfd(PelIfd::GPS);
	$ifd0->addSubIfd($gps);
	$gps->addEntry(new PelEntryRational(PelTag::GPS_LATITUDE, array(35, 1), array(0, 1), array(0, 1)));
	$gps->addEntry(new PelEntryAscii(PelTag::GPS_LATITUDE_REF, 'N'));
	$gps->addEntry(new PelEntryRational(PelTag::GPS_LONGITUDE, array(135, 1), array(0, 1), array(0, 1)));
	$gps->addEntry(new PelEntryAscii(PelTag::GPS_LONGITUDE_REF, 'E'));
	file_put_contents("b.jpg", $jpeg->getBytes());
	echo "wrote b.jpg\n";
}
?>