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")) . "
";