for old version

getrest.php

<?php
#xxxx-yy-zz形式の文字列から残り日数を求める
function getrest_prs($str) {
    date_default_timezone_set('Asia/Tokyo');
	
	$a = date_parse($str);
	
	$year = $a['year']; $month = $a['month']; $day = $a['day'];
	
	$t1 = mktime(0,0,0,$month,$day,$year);
	$t2 = time();
	
	$one_day = 60*60*24;
	
	$one_day_trim = ceil(($t1-$t2) / $one_day);
	
	return $one_day_trim ;
}