哪个PHP函数可以返回当前日期/时间?


当前回答

我发现在PHP中获取当前时间的最简单方法是这样的。

//Prints out something like 10:00am Just be sure to set your timezone correctly.
date_default_timezone_set("America/Chicago");
$TIME = date('G:ia'); 

其他回答

设置时区:

date_default_timezone_set('Asia/Calcutta');

然后调用日期函数

$date = date('Y-m-d H:i:s');
 $date = new DateTime('now', new DateTimeZone('Asia/Kolkata'));
 echo $date->format('d-m-Y H:i:s');

更新

 //Also get am/pm in datetime:
 echo $date->format('d-m-Y H:i:s a'); // output 30-12-2013 10:16:15 am

对于日期格式,PHP date() Function很有用。

date_default_timezone_set('Europe/Warsaw');
echo("<p class='time'>".date('H:i:s')."</p>");
echo("<p class='date'>".date('d/m/Y')."</p>");

下面是一些常用的表示时间的字符:

H -以前导零表示的12小时格式(01到12) i -前导0的分钟(00到59) s -前导0的秒(00到59) a -小写的子午线前后(am或pm)

确定你的时区

<?php
    date_default_timezone_set("America/New_York");
    echo "The time is " . date("h:i:sa");
?>

看看这个(可选)

<?php
    $d = mktime(11, 14, 54, 8, 12, 2014);
    echo "Created date is " . date("Y-m-d h:i:sa", $d);
?>

为日期

<?php
    echo "Today is " . date("Y/m/d") . ;
    echo "Today is " . date("Y.m.d") . ;
    echo "Today is " . date("Y-m-d") . ;
    echo "Today is " . date("l");
?>

下面是一些常用来表示日期的字符:

d -表示一个月中的第一天(01 ~ 31) m -代表一个月(01 ~ 12) Y -年份(四位数) l(小写“l”)-代表星期几

Source-W3-Schools

使用date()和DateTimeInterface::format格式化日期,即date('Y-m-d H:i:s');,你有这些可选格式:

来源:DateTimeInterface:::格式页面。

format character Description Example returned values
Day --- ---
d Day of the month, 2 digits with leading zeros 01 to 31
D A textual representation of a day, three letters Mon through Sun
j Day of the month without leading zeros 1 to 31
l (lowercase 'L') A full textual representation of the day of the week Sunday through Saturday
N ISO 8601 numeric representation of the day of the week 1 (for Monday) through 7 (for Sunday)
S English ordinal suffix for the day of the month, 2 characters st, nd, rd or th. Works well with j
w Numeric representation of the day of the week 0 (for Sunday) through 6 (for Saturday)
z The day of the year (starting from 0) 0 through 365
Week --- ---
W ISO 8601 week number of year, weeks starting on Monday Example: 42 (the 42nd week in the year)
Month --- ---
F A full textual representation of a month, such as January or March January through December
m Numeric representation of a month, with leading zeros 01 through 12
M A short textual representation of a month, three letters Jan through Dec
n Numeric representation of a month, without leading zeros 1 through 12
t Number of days in the given month 28 through 31
Year --- ---
L Whether it's a leap year 1 if it is a leap year, 0 otherwise.
o ISO 8601 week-numbering year. This has the same value as Y, except that if the ISO week number (W) belongs to the previous or next year, that year is used instead. Examples: 1999 or 2003
X An expanded full numeric representation of a year, at least 4 digits, with - for years BCE, and + for years CE. Examples: -0055, +0787, +1999, +10191
x An expanded full numeric representation if requried, or a standard full numeral representation if possible (like Y). At least four digits. Years BCE are prefixed with a -. Years beyond (and including) 10000 are prefixed by a +. Examples: -0055, 0787, 1999, +10191
Y A full numeric representation of a year, at least 4 digits, with - for years BCE. Examples: -0055, 0787, 1999, 2003, 10191
y A two digit representation of a year Examples: 99 or 03
Time --- ---
a Lowercase Ante meridiem and Post meridiem am or pm
A Uppercase Ante meridiem and Post meridiem AM or PM
B Swatch Internet time 000 through 999
g 12-hour format of an hour without leading zeros 1 through 12
G 24-hour format of an hour without leading zeros 0 through 23
h 12-hour format of an hour with leading zeros 01 through 12
H 24-hour format of an hour with leading zeros 00 through 23
i Minutes with leading zeros 00 to 59
s Seconds with leading zeros 00 through 59
u Microseconds. Note that date() will always generate 000000 since it takes an int parameter, whereas DateTime::format() does support microseconds if DateTime was created with microseconds. Example: 654321
v Milliseconds. Same note applies as for u. Example: 654
Timezone --- ---
e Timezone identifier Examples: UTC, GMT, Atlantic/Azores
I (capital i) Whether or not the date is in daylight saving time 1 if Daylight Saving Time, 0 otherwise.
O Difference to Greenwich time (GMT) without colon between hours and minutes Example: +0200
P Difference to Greenwich time (GMT) with colon between hours and minutes Example: +02:00
p The same as P, but returns Z instead of +00:00 (available as of PHP 8.0.0) Examples: Z or +02:00
T Timezone abbreviation, if known; otherwise the GMT offset. Examples: EST, MDT, +05
Z Timezone offset in seconds. The offset for timezones west of UTC is always negative, and for those east of UTC is always positive. -43200 through 50400
Full Date/Time --- ---
c ISO 8601 date 2004-02-12T15:19:21+00:00
r » RFC 2822/» RFC 5322 formatted date Example: Thu, 21 Dec 2000 16:01:07 +0200
U Seconds since the Unix Epoch (January 1 1970 00:00:00 GMT) See also time()