Php calculates the age based on the ID card number

We only need to know the generation rules of the ID card. for example, the number of places from the specified position to the next is the date, and then we convert the date to the timestamp, and then perform the addition and subtraction operation to get the age.

We only need to know the ID card generation rules. for example, the number of places from the specified location to the next is the date of departure, then we convert the date into a timestamp and then perform the addition and subtraction operation to get the age. the following shows the instance code:

2. Function getAgeByID ($ id ){
4. // After this year's birthday, you will be 1 year old.
5. If (emptyempty ($ id) return '';
6. $ Date = strtotime (substr ($ id, 6, 8 ));
7. // Obtain the date of birth, month, and day
8. $ Today = strtotime ('today ');
9. // Obtain the timestamp of today
10. $ Diff = floor ($ today-$ date)/86400/365 );
11. // Obtain the approximate number of years of difference between the two dates
13. // After strtotime is added with this number of years, get the timestamp of that day and compare it with today's timestamp.
14. $ Age = strtotime (substr ($ id, 6, 8). '+'. $ diff. 'ears')> $ today? ($ Diff + 1): $ diff;
16. Return $ age;
17. }
18. ?>