[SOLVED] mktime to a variable

[bschultz]

I can't seem to find any documentation on how to apply mktime to a variable.  I have a url that will pass a date in the format of:  xxxx-x-x

 

I need to take that date, and find the previous month to that variable.

 

Since I couldn't find any documentation on how to apply it to a variable, I tried this...which didn't work.

 

$day = $_GET['day'];
$previousmonth = "$day mktime(0, 0, 0, date('m')-1)";

 

How is this supposed to be done? 

 

Thanks.

[Ken2k7]

I'm guessing the xxxx is the year. What's the other two? Can't you use explode on the hyphen, grab the month part and subtract 1 from it? You don't need mktime.

[bschultz]

I get an "invalid day" error on this code

 

$day = $_GET['day'];

$data = "$day";
list($year, $month, $date) = explode("-", $data);	

$previousmonth = ($month - 1);

$thisyear = date("Y");
    
    // find out the number of days in the month
    $numdaysinmonth = cal_days_in_month( CAL_GREGORIAN, $previousmonth, $thisyear );

[Ken2k7]

1. What is up with people doing $data = "$day";? There's no need to put quotes around the variable like that.

2. What is the full error message? Can you copy and paste the error message?

[bschultz]

Warning: cal_days_in_month() [function.cal-days-in-month]: invalid date. in daily.php on line 42

 

 

This is line 42

$numdaysinmonth = cal_days_in_month( CAL_GREGORIAN, $previousmonth, $thisyear );

 

 

[Ken2k7]

Can you put:

var_dump($previousmonth);

 

After

$previousmonth = ($month - 1);

 

?

 

What does that output?

[bschultz]

int(-1)

[Ken2k7]

Put this somewhere...

var_dump($_GET['day']);

[bschultz]

I got it...$_GET[day] was in 2009-18-06 format...when it should have been 2009-06-18 format.

 

Thanks...again!