Comparing current date to last date of each month

Hi, 🙂

I'm currently attempting to write a small script that compares the current date against the last date of the given month.

So, as it's December atm, the script would check how many days are in December and return whether today == 31st or not.

It's basically to be used for issuing a award to one user on the last day of each month.

Any suggestions?

Thanks in advance!

if (date('t') == date('j') {
    issue_award();
}