How to calculate variable value in PHP

Question

I am new to PHP.

I want to show user's Age in numbers on user profile page.

I am recording user's Birth year in the database with this variable'birth_year'

I am not recording entire date of birth in datetime format.. I am only recording year like 1991

So currently if I want to display user's country then I write something like below

   <?php echo $user[country]; ?>

And that display's name of the country

Now similarly, I want to disply user's age.

So I am writting something like below but its working

<?php echo date('y') - $user[birth_year] ; ?>

So what php code should I write to get value of (Birth Year - Current Year)

What are your error? Did you actually use `$user[country];`? — Mawia HL, Nov 05 '16 at 09:11
Possible duplicate of [PHP calculate age](http://stackoverflow.com/questions/3776682/php-calculate-age) — insertusernamehere, Nov 05 '16 at 09:12
Honestly, you should be able to figure this out by yourself or google "php subtract numbers" or something. This is VERY basic stuff. — Jite, Nov 05 '16 at 09:12

score 1 · Answer 1 · answered Nov 05 '16 at 09:13

You can get it by substract birthday date from current date.

Example -

  # object oriented
    $from = new DateTime('1970-02-01');
    $to   = new DateTime('today');
    echo $from->diff($to)->y;

    # procedural
    echo date_diff(date_create('1970-02-01'), date_create('today'))->y;

score 0 · Answer 2 · answered Nov 05 '16 at 09:14

0

<?= date('y') - $birth_year  ?> //only one line needed

try this code in php bracket

Here date('y') will return you current year (2016) and $birth_year is already having year of birth (Ex: 1994) so answer would be age

answered Nov 05 '16 at 09:14

Manish Patil

11
2

I wrote but not working – Lokapedia Nov 05 '16 at 09:26
tried without = like this but still not working :( – Lokapedia Nov 05 '16 at 09:32

How to calculate variable value in PHP

2 Answers2