php 时间处理函数--获取某个间隔前的日期

最新推荐文章于 2021-04-03 09:00:12 发布

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本文详细介绍了PHP中日期时间格式化的各种字符使用方法，包括如何获取特定格式的日期字符串，如年月日时分秒等，并通过实例展示了如何计算特定时间点。

例子：

获取90秒前的时间点：

$d= time();
echo $d;
$c=date("Y-m-d H:i:s",$d-90);
$e=date("Y-m-d H:i:s",$d);
echo "/n";
echo $c."---".$e;

1275906638 2010-06-07 18:29:08---2010-06-07 18:30:38

a	'am' or 'pm'
A	'AM' or 'PM'
B	Swatch Internet time
d	day of the month, 2 digits with leading zeros; i.e. '01' to '31'
D	day of the week, textual, 3 letters; i.e. 'Fri'
F	month, textual, long; i.e. 'January'
g	hour, 12-hour format without leading zeros; i.e. '1' to '12'
G	hour, 24-hour format without leading zeros; i.e. '0' to '23'
h	hour, 12-hour format; i.e. '01' to '12'
H	hour, 24-hour format; i.e. '00' to '23'
i	minutes; i.e. '00' to '59'
I (capital i)	'1' if Daylight Savings Time, '0' otherwise.
j	day of the month without leading zeros; i.e. '1' to '31'
l (lowercase 'L')	day of the week, textual, long; i.e. 'Friday'
L	boolean for whether it is a leap year; i.e. '0' or '1'
m	month; i.e. '01' to '12'
M	month, textual, 3 letters; i.e. 'Jan'
n	month without leading zeros; i.e. '1' to '12'
r	RFC 822 formatted date; i.e. 'Thu, 21 Dec 2000 16:01:07 +0200' (added in PHP 4.0.4)
s	seconds; i.e. '00' to '59'
S	English ordinal suffix, textual, 2 characters; i.e. 'th', 'nd'
t	number of days in the given month; i.e. '28' to '31'
T	Timezone setting of this machine; i.e. 'MDT'
U	seconds since the epoch
w	day of the week, numeric, i.e. '0' (Sunday) to '6' (Saturday)
Y	year, 4 digits; i.e. '1999'
y	year, 2 digits; i.e. '99'
z	day of the year; i.e. '0' to '365'
Z	timezone offset in seconds (i.e. '-43200' to '43200'). The offset for timezones west of UTC is always negative, and for those east of UTC is always positive.