PHP basic case 2: Calculating student age

1. Requirements Analysis

In order to conveniently, accurately and quickly display the student's age, the system usually automatically calculates it based on the student's date of birth. Next, please use PHP variables to save the student's year, month, and day respectively, and obtain the current year, month, and day through the data function in PHP, and finally calculate the student's age.

For example:

The date of birth is: August 2, 2000

If it is May 2020, the age is 20 years old

If it is October 2020, the age is 19 years old

2. Design ideas

1. How to define Variables store student information. What are these variables?

2. #How to define variables to save the year, month, and day of a student’s birth?

3. #How to get the year, month and date of the current time?

4. #How to calculate a student’s age from birth to the current year?

5. #How to determine whether a student has a birthday?

3. Knowledge reserve

1. Introduction to PHP Date/Time

Date/Time function allows you to Get the date and time from the server where the PHP script is running. You can use the Date/Time functions to format dates and times in different ways.

2. Definition and usage

date() function formats the local date and time and returns the formatted date string.

3. Syntax

date(format,timestamp);
Returns a string generated by integer timestamp according to the given format string. If no timestamp is given, the local current time is used. In other words, timestamp is optional and the default value is time().

For details, please read this article: https://www.jb51.net/article/148360.htm

4. Several commonly used parameters

4. Code implementation

5. Effect display

Today is November 2, 2020.

The above is the detailed content of PHP basic case 2: Calculating student age. For more information, please follow other related articles on the PHP Chinese website!