How does php tell if a year is a leap year?

This article mainly introduces the relevant knowledge of php how to judge whether a year is a leap year, the content is detailed and easy to understand, the operation is simple and fast, and it has a certain reference value. I believe you will gain something after reading this php article on how to judge whether a year is a leap year. Let's take a look.

Judgment method: 1, use the "strtotime (" specified year value-02 ") statement to convert the date of the specified year into a Unix timest 2, use the" date ("t", timestamp) = = 29 "statement to get the number of days in February in the specified year, and determine whether the number of days is equal to 29, if it is a leap year, otherwise it is not a leap year.

Operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

Using php to judge whether a year is a leap year

February in a leap year has 29 days. We can use date () to get the number of days contained in February in a given year $year, and determine whether the number of days is 29 days, so that we can determine whether a given year $year is a leap year.

Implementation code:

Test it:

F (2022); f (2021); f (2020); f (2012); f (2010)

Analysis:

In the above example, the strtotime ("{$year}-02") statement converts the date in the format "xxxx-02" into a Unix timest then you can use the date ("t", $time) statement to get the number of days contained in February of the $yearbook year, and use the if statement to determine whether the number of days is equal to 29 days, you can determine whether $year is a leap year.

The "t" character parameter of the date () function can be used to get the number of days contained in a given month, and many characters are built into the function to control the format of the output date string. In fact, there is a character "L" that can be used to determine whether it is a leap year (1 if it is a leap year, otherwise 0).

This is the end of the article on "how php determines whether a year is a leap year or not". Thank you for reading! I believe you all have a certain understanding of "how to judge whether a year is a leap year or not". If you want to learn more, you are welcome to follow the industry information channel.