php dates

i what to figure out the date that is excatly 30 before the current in php. I can get the current date but i don't know how to subtract 30 days from it. Any suggestions?

Thanks.

Peter

 

PHP:

<?php
$lastday = mktime(0, 0, 0, date('m'),date('d')-30,date('Y'));
echo strftime("The date 30 days ago was: %m/%d/%Y", $lastday);
?> 

That takes 30 days off the date and gives it back to you in mm/dd/yyyy.

Should work.

 

will that account for months that have different number of days?

 

Yep, should do.

 

ok i'll try it.

thanks