PHP date and time application twelve: get the current month and its previous three months

Today I will continue to introduce you to the PHP date application series, which is very suitable for newcomers to learn~ Then in the previous article "PHP Date and Time Application Eleven: Three Methods to Compare Two Specified Dates" I introduce to you how to use 3 methods to compare two dates. Friends in need can learn~

→Related recommendations: "PHP date and time application guide Summary (continuously updated~) 》

The theme of this article is to teach you how to write a PHP script to get the current month and the previous three months.

What exactly does it mean? For example, if the current date is May, the first three months obtained are February, March, and April.

Let’s go directly to the PHP code:

is as follows:

<?php
echo date("m - Y")."<br>";
echo date("m - Y",strtotime("-1 Months"))."<br>";
echo date("m - Y",strtotime("-2 Months"))."<br>";
echo date("m - Y",strtotime("-3 Months"))."<br>";

The output result is:

08 - 2021
07 - 2021
06 - 2021
05 - 2021

It can be seen that the current month is August, then the first three months are May, June, and July respectively. Success!

What we need to master in the above code is the use of date(), strtotime() functions and various date characters:

The Date() function in PHP can format the timestamp into a more readable date and time.

The strtotime() function in PHP can parse any date or time description in English text into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 GMT).

By the way, here are some characters commonly used in dates:

d - 表示月里的某天（01-31）
m - 表示月（01-12）
Y - 表示年（四位数）
1 - 表示周里的某天
注：其他字符，比如 "/", "." 或 "-" 也可被插入字符中，以增加其他格式。

The following are characters commonly used in time:

h - 带有首位零的 12 小时小时格式
i - 带有首位零的分钟
s - 带有首位零的秒（00 -59）
a - 小写的午前和午后（am 或 pm）
注：PHP date()函数会返回服务器的当前日期/时间！

I don’t know if your solution is the same as mine. ? Hope you gain something!

Finally, I would like to recommend the latest and most comprehensive "PHP Video Tutorial"~ Come and learn!

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