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manipulating with date type input

mysql php

12:18 am on Feb 2, 2008 (gmt 0)

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joined:Nov 21, 2007
posts: 54
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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?


3:49 am on Feb 2, 2008 (gmt 0)

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joined:May 13, 2007
posts: 26
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Try this, I didn't use comments because the variables seem pretty self-explanatory.

$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.