Adding time in PHP

Question

I am pulling a datetime from a mysql db and i would like to add X hours to it then compare it to the current time. So far i got

$dateNow = strtotime(date(\'Y         


        

Answer 1

Probably the safest way to do the compare is right in the SQL

SELECT * FROM my_table WHERE someDateTimeColumn < DATE_ADD(NOW(), INTERVAL 4 hour)

And since you're assembling it in PHP, you can dynamically replace the "4 hour" bit with whatever your code needs to compare.

(Note: putting the entire calculation on the other side of the comparison to the column allows MySQL to do the calculation once per query, rather than once per row, and also use the table's index, if that column has one.)