php获取前一天、后一天等日期的方法

date_default_timezone_set(&＃39;PRC&＃39;); //默认时区
echo "今天:",date("Y-m-d",time()),"
";
echo "今天:",date("Y-m-d",strtotime("18 june 2008")),"
";
echo "昨天:",date("Y-m-d",strtotime("-1 day")), "
";
echo "明天:",date("Y-m-d",strtotime("&＃43;1 day")), "
";
echo "一周后:",date("Y-m-d",strtotime("&＃43;1 week")), "
";
echo "一周零两天四小时两秒后:",date("Y-m-d G:H:s",strtotime("&＃43;1 week 2 days 4 hours 2 seconds")), "
";
echo "下个星期四:",date("Y-m-d",strtotime("next Thursday")), "
";
echo "上个周一:".date("Y-m-d",strtotime("last Monday"))."
";
echo "一个月前:".date("Y-m-d",strtotime("last month"))."
";
echo "一个月后:".date("Y-m-d",strtotime("&＃43;1 month"))."
";
echo "十年后:".date("Y-m-d",strtotime("&＃43;10 year"))."
";
?>

自己的总结

echo date("Y-m-d",strtotime("-1 day"))."
";
$time&＃61;date("Y-m-d",strtotime("-1 day"));
$timearray&＃61;explode("-",$time);
$month &＃61; $timearray[1];
$day &＃61; $timearray[2];
$year &＃61; $timearray[0];
echo mktime(0,0,0,$month,$day,$year)."
";
$timecuo &＃61; mktime(0,0,0,$month,$day,$year);
$date3&＃61;date(&＃39;Y-m-d H:i:s&＃39;,$timecuo);
echo $date3;