哪个PHP函数可以返回当前日期/时间?


当前回答

Use:

$date = date('m/d/Y h:i:s a', time());

它的工作原理。

其他回答

时间会随着服务器时间流逝。一个简单的解决方法是在调用date()或time()函数之前使用date_default_timezone_set手动设置时区。

我在澳大利亚墨尔本,所以我有这样的东西:

date_default_timezone_set('Australia/Melbourne');

或者另一个例子是洛杉矶-美国:

date_default_timezone_set('America/Los_Angeles');

你还可以通过以下命令查看服务器当前所在的时区:

date_default_timezone_get();

比如:

$timezone = date_default_timezone_get();
echo "The current server timezone is: " . $timezone;

所以你问题的简短答案是:

// Change the line below to your timezone!
date_default_timezone_set('Australia/Melbourne');
$date = date('m/d/Y h:i:s a', time());

那么所有的时间都将是你刚刚设置的时区:)

<?php
echo "<b>".date('l\, F jS\, Y ')."</b>";
?>

像这样的指纹

2012年12月9日,星期天

根据如何使用PHP获取当前日期时间(NOW)这篇文章,有两种常见的方法来获取当前日期。要在PHP中获取当前的日期时间(now),您可以在任何PHP版本中使用date类,或者在PHP >= 5.2中使用datetime类。

这里有各种日期格式表达式。

使用日期的示例

该表达式将以Y-m-d H:i:s格式返回NOW。

<?php
    echo date('Y-m-d H:i:s');
?>

使用datetime类的示例

该表达式将以Y-m-d H:i:s格式返回NOW。

<?php
    $dt = new DateTime();
    echo $dt->format('Y-m-d H:i:s');
?>

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()
date(format, timestamp)

date函数返回一个根据给定格式字符串使用给定整数时间戳格式化的字符串,如果没有给出时间戳则返回当前时间。换句话说,timestamp是可选的,默认值为time()。

参数为-

format -必选。指定时间戳格式 timestamp -时间戳(可选)。默认为当前日期和时间

如何获得一次简单的约会

date()函数所需的format参数指定如何格式化日期(或时间)。

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

还可以在字符之间插入其他字符,如“/”、“。”或“-”,以添加额外的格式。

下面的例子用三种不同的方式格式化今天的日期:

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

一些有用的链接

gmdate() -格式化a 格林尼治时间/ UTC日期/时间 idate() -格式化a 本地时间/日期为整数 getdate() -获取 日期/时间信息 getlastmod () - 获取最后一页修改的时间 mktime() -获取Unix 日期的时间戳 strftime() -格式 根据区域设置的本地时间/日期 time() -返回电流 Unix时间戳 strtotime () 解析任何英文文本日期时间描述到Unix 时间戳 预定义的DateTime 常量