Detailed explanation of date() function in php (1/2)_PHP tutorial

Now let’s introduce some usage and basic details about the date() function in php. You can refer to it.

date function usage

The code is as follows

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代码如下	复制代码
date($t);

date($t);

The format is as follows:

Displayed format: year-month-day hour:minute:second
Relevant time parameters:
a - "am" or "pm"
A - "AM" or "PM"
d - day, two digits, if there are less than two digits, add zero in front; for example: "01" to "31"
D - day of the week, three English letters; such as: "Fri"
F - month, full English name; such as: "January"
h - hour in 12-hour format; e.g.: "01" to "12"
H - hour in 24-hour format; e.g.: "00" to "23"
g - hour in 12-hour format, no zeros are added if there are less than two digits; such as: "1" to 12"
G - hour in 24-hour format, no zeros are added if there are less than two digits; such as: "0" to "23"
i - minutes; e.g.: "00" to "59"
j - Day, two digits, if there are less than two digits, do not add zeros; for example: "1" to "31"
l - day of the week, full English name; such as: "Friday"
m - month, two digits, if there are less than two digits, add zeros in front; such as: "01" to "12"
n - month, two digits, if there are less than two digits, no zero will be added; for example: "1" to "12"
M - month, three English letters; such as: "Jan"
s - seconds; e.g.: "00" to "59"
S - add an English ordinal number at the end of the word, two English letters; such as: "th", "nd"
t - the number of days in the specified month; such as: "28" to "31"
U - Total seconds
w - Numeric day of the week, such as: "0" (Sunday) to "6" (Saturday)
Y - year, four digits; such as: "1999"
y - year, two digits; such as: "99"
z - day of the year; e.g.: "0" to "365"

You can freely set the displayed content, connection symbols or display position, such as date("m-d H") or date("dmY");?> and other date processing in php

Example

1, year-month-day

代码如下	复制代码
echo date('Y-m-j'); 2007-02-6 echo date('y-n-j'); 07-2-6

The code is as follows

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echo date('Y-m-j');

2007-02-6

代码如下	复制代码
echo date('Y-M-j'); 2007-Feb-6   echo date('Y-m-d'); 2007-02-06

echo date('y-n-j');

代码如下	复制代码
echo date('Y-M-j'); 2007-Feb-6   echo date('Y-F-jS'); 2007-February-6th

07-2-6

Capital Y represents the four-digit year, while lowercase y represents the two-digit year; Lowercase m represents the number of the month (with a leading), while lowercase n represents the number of the month without the leading.

The code is as follows	Copy code
echo date('Y-M-j'); 2007-Feb-6 echo date('Y-m-d'); 2007-02-06

Capital M represents the 3 abbreviated characters of the month, while lowercase m represents the number of the month (with leading 0); There is no uppercase J, only lowercase j represents the day of the month, without the leading o; if a leading month is required, use a lowercase d.

The code is as follows	Copy code
echo date('Y-M-j'); 2007-Feb-6 echo date('Y-F-jS'); 2007-February-6th

Capital M represents the 3 abbreviated characters of the month, while capital F represents the full English version of the month. (no lowercase f)
Capital S represents the suffix of the date, such as "st", "nd", "rd" and "th", depending on the date number.

Summary:
You can use uppercase Y or lowercase y to indicate the year;
Months can be represented by uppercase F, uppercase M, lowercase m and lowercase n (two ways to represent characters and numbers respectively);
Lowercase d and lowercase j can be used to represent the day, and uppercase S represents the suffix of the date.

2. Hour:minute:second

By default, the time displayed by PHP interpretation is "Greenwich Mean Time", which is 8 hours different from our local time.

The code is as follows

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代码如下	复制代码
echo date('g:i:s a'); 5:56:57 am   echo date('h:i:s A'); 05:56:57 AM

echo date('g:i:s a');

代码如下	复制代码
echo date('G:i:s'); 14:02:26

5:56:57 am

echo date('h:i:s A'); 05:56:57 AM

A lowercase g indicates a 12-hour format without leading 0s, while a lowercase h indicates a 12-hour format with leading 0s. When using the 12-hour clock, it is necessary to indicate morning and afternoon. Lowercase a represents lowercase "am" and "pm", and uppercase A represents uppercase "AM" and "PM".

The code is as follows	Copy code
echo date('G:i:s'); 14:02:26

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