php 处理date对象,PHP DateTime 对象和 Date 函数的 Demo

DateTime对象

//设置时间时区

date_default_timezone_set('PRC');

$dateFormat = "Y-m-d";

$dateTimeFormat = "Y-m-d H:i:s";

//获取当前时间

$date = new DateTime();

echo $date->format($dateTimeFormat) . "n";

//时间2015-01-01加上7年5月4天4小时3分钟2秒

$date = new DateTime('2015-01-01');

$addDate = new DateInterval('P7Y5M4DT4H3M2S');

$date->add($addDate);

echo $date->format($dateTimeFormat) . "n";

//时间2015-05-29加上1年2月3天

$date = new DateTime('2015');

$date->add(new DateInterval('P1Y2M3D'));

echo $date->format($dateFormat) . "n";

//当前时间加上3小时2分钟1秒

$date = new DateTime();

$date->add(new DateInterval('PT3H2M1S'));

echo $date->format($dateTimeFormat) . "n";

$date = DateTime::createFromFormat($dateFormat, '2009-02-15');

echo $date->format($dateTimeFormat) . "n";

$date = new DateTime();

$date->setDate(2222, 12, 22);

echo $date->format($dateFormat) . "n";

$date = new DateTime();

$date->setTime(14, 55);

echo $date->format($dateTimeFormat) . "n";

$date = new DateTime();

$date->setTimestamp(1171502725);

echo $date->format($dateTimeFormat) . "n";

//时间的比较

$Today = new DateTime();

$Tomorrow = new DateTime();

$Tomorrow->add(new DateInterval('P1D'));

$diff = $Tomorrow->diff($Today);

echo 'Difference: ' . $diff->format('%m month, %d days (total: %a days)') . "n";

if ($Today < $Tomorrow) {

echo "Today is before Tomorrow!n";

}

//获取时间戳以及输出格式化的时间戳

$date = new DateTime();

echo $date->getTimestamp() . "n";

echo $date->format($dateTimeFormat) . "n";

date 函数

//默认时区

date_default_timezone_set('PRC');

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("+1 day")) . "
";

echo "一周后:" . date("Y-m-d", strtotime("+1 week")) . "
";

echo "一周零两天四小时两秒后:" . date("Y-m-d G:H:s", strtotime("+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("+1 month")) . "
";

echo "十年后:" . date("Y-m-d", strtotime("+10 year")) . "
";