manipulating with date type input

mysql php

[ksugam]

Hello,
I have a text field in which the users enter date in yyyy/mm/dd format. I get the value and put it in mysql query.
My concern is, i want to compare the data with previous month as well...

So if the user enters 2007/12/01, i will display data for dec 07. Now i want to compare dec 07 data with nov 07 data as well. So how can i calculate the previous month from the input?

Thanks!

[yumigator]

Try this, I didn't use comments because the variables seem pretty self-explanatory.

<?php
$date = "2007/12/01";
$datearray = explode("/", $date);
$month = $datearray[1];
echo("This month is ". $month . "<br>");
$lastmonth = $month - 1;
echo("Last month was " . $lastmonth);
?>

Just be careful that if the month is January, this will calculate last month as 0 (not 12). An if statement or two will take care of that.