How to convert timestamp to time format in php?

In PHP, you can use the date() function to convert the timestamp into a time format. This function can format the timestamp into a more readable date and time. The syntax format is "date(" time The output format of the stamp is ",timestamp)", for example "date("Y-m-d H:i:s",timestamp)".

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When the time and date are saved in the computer, you can use UNIX timestamp as standard format. However, the readability of UNIX timestamps is very poor, so sometimes we need to format the UNIX timestamps into more readable time and date, or format them into the format required by other software.

In PHP, you can use the date() function to format the timestamp into a more readable date and time.

The syntax format of this function is as follows:

date($format [,$timestamp])

Parameters:

• format is required. Specifies the format of the timestamp.

• timestamp Optional. Specify timestamp. The default is the current date and time.

Parameter $format The special characters that can be recognized in the format string are as shown in the following table:

##DThe English abbreviation of the day of the week (using 3 letters)Mon to Sun in the month Days without leading zeros ##l (lowercase letter of "L")NS##WAccording to ISO-8601 standard format , using numbers to represent the week of the year, each week starting from Monday, (new in PHP 4.1.0) For example: 42 (the 42nd week of the year)------F Month in English Words, such as January or JuneJanuary to DecembermUse two digits to represent the current month01 to 12M The English abbreviation of the month Jan to DecnUse numbers to represent the current month1 to 12tSpecify the number of days in the month28 to 31##年LoY##yUse 2 digits to represent the yearFor example: 99 or 03Time---aLowercase AM and PM valuesam or pmUppercase AM and PM valuesSwatch Internet standard time Use 12-hour format to represent hoursUse 24-hour format to represent hours

format character	Description	Return value example
日	---	---
d	The day of the month is represented by two digits. If there are less than two digits, add 0	01 to 31
j		1 to 31
English words for days of the week	Sunday to Saturday
According to the ISO-8601 standard format, using numbers to represent the middle of the week The number of days (newly added in PHP5.1.0)	1 (meaning Monday) to 7 (meaning Sunday)
Every month The English suffix after the number of days (represented by 2 characters)	st, nd, rd or th.Can be used with j
w	Use numbers to represent the day of the week	0 (for Sunday) to 6 (for Saturday)
z	Use numbers to represent the days of the year	0 to 365
Week	---	---
月
---	---
Whether the specified year is a leap year	If it is a leap year, the value is 1, otherwise it is 0
According to the ISO-8601 standard The format uses numbers to represent the year, which has the same effect as Y (new in PHP 5.1.0)	1999 or 2019
Use 4 One digit represents the complete year	For example: 1999 or 2019
---
		##A
AM or PM		B
000 to 999		g
1 to 12		G
0 to 23
h	使用 12 小时格式表示小时数，有前导零	01 到 12
H	使用 24 小时格式表示小时数，有前导零	00 到 23
i	使用两位数字表示分钟数，有前导零	00 到 59>
s	使用两位数字表示秒数，有前导零	00 到 59>
u	毫秒（PHP 5.2.2 新增）。需要注意的是 date() 函数总是返回 000000，因为它只接受 integer 参数，而 DateTime::format() 才支持毫秒	例如：654321
时区	---	---
e	时区标识	例如：UTC、GMT、Atlantic/Azores
I（大写的“i”）	是否为夏令时	夏令时为 1，否则为 0
O	与格林尼治时间相差的小时数	例如：+0200
P	与格林尼治时间（GMT）的差别，小时和分钟之间由冒号分隔	例如：+02:00
T	本机所在的时区	例如：EST、MDT（在 windows 下为完整文本格式，例如“Eastern Standard Time”，中文版会显示“中国标准时间”）
Z	时差偏移量的秒数，UTC 西边的时区偏移量总是负的，UTC 东边的的时区偏移量总是正的	-43200 到 43200
完整的日期／时间	---	---
c	ISO-8601 格式的日期	2014-02-12T15:19:21+00:00
r	RFC 822 格式的日期	例如：Thu,21 Dec 2000 16:01:07 +0200
U	从 UNIX 纪元（January 1 1970 00:00:00 GMT）开始至今的秒数	和 time() 返回相同的时间戳

提示：特殊字符中不能被识别的字符将原样显示，Z 字符在使用 gmdate() 函数时总是返回 0。

示例1：

<?php
echo date("Y-m-d H:i:s","1256112010")."<br>";
echo date(&#39;l dS \\\\\\\\\\\\\\\\of F Y h:i:s A&#39;,"1220976000")."<br>";
echo date("Y/m/d H:i:s","1604629565")."<br>";
echo date("Y.m.d H:i:s","1604545871");
?>

输出：

2009-10-21 16:00:10
Wednesday 10th of September 2008 12:00:00 AM
2020/11/06 10:26:05
2020.11.05 11:11:11

示例2：

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);
// 设定要用的时区
date_default_timezone_set(&#39;PRC&#39;);
// 输出类似Monday
echo date("l");
echo "<br/>";
// 输出类似Monday 15th of August 2005 03:12:46 PM
echo date(&#39;l dS \\\\\\\\\\\\\\\\of F Y h:i:s A&#39;);
echo "<br/>";
// 输出July 1, 2000 is on a Saturday
echo "July 1, 2000 is on a " . date("l");
echo "<br/>";
/* 在格式参数中使用常量 */
// 输出类似Wed, 25 Sep 2013 15:28:57 -0700
echo date(DATE_RFC2822);
echo "<br/>";
// 输出类似2000-07-01T00:00:00+00:00
echo date(DATE_ATOM);
echo "<br/>";
//输出类似2000-07-01 14:00:00
echo date(&#39;Y-m-d H:i:s&#39;).&#39;<br>&#39;;
$time = time();
echo &#39;是一周中的第 &#39;.date(&#39;w&#39;, $time).&#39; 天<br>&#39;;
echo &#39;今年是：&#39;;
date(&#39;L&#39;, $time)? print(&#39;闰年&#39;):print(&#39;平年&#39;);
?>

输出：

Thursday
Thursday 05th of November 2020 10:32:44 AM
July 1, 2000 is on a Thursday
Thu, 05 Nov 2020 10:32:44 +0800
2020-11-05T10:32:44+08:00
2020-11-05 10:32:44
是一周中的第 4 天
今年是：闰年

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