[SOLVED] Help please! mktime is skipping September 09!

[catchy]

Hey,

 

I have an app that generates an array of 27 days from any given day at the start, to display a gannt chart of 4 weeks in advance. BUT as of today (31 August 2009), September goes missing! It jumps straight to 01 OCt, 02 Oct, and so on.

 

Here's the code ($days is the array):

 

for($i=0; $i<=27; $i++) {

  $last_day = date('d',mktime(date('h'), date('i'), date('s'), date('m'), date('d',mktime(date('H'),date('i'),date('s'),$this_month,$this_day+$i,$this_year)), date('Y')));

  $days[] = $last_day;

  $last_month = date('m',mktime(date('h'), date('i'), date('s'), date('m',mktime(date('H'),date('i'),date('s'),$this_month,$this_day+$i,$this_year)), date('j'), date('Y')));

  $last_year = date('Y',mktime(date('h'), date('i'), date('s'), date('m'), date('d'), date('Y',mktime(date('H'),date('i'),date('s'),$this_month,$this_day+$i,$this_year))));

}

 

As you can see, it uses mktime to add an increasing ($i) no. of days to the $last_month variable. BUT it jumps straight from 31/08/09 to 01/10/09.

 

Help! Any ideas?

 

Thanks heaps.

 

[btherl]

That code is just too difficult to understand.  Can you do it without nesting function calls?  It'll be more lines but it'll improve readability no end.  Then it'll be easier to find the bug.

[PFMaBiSmAd]

Leading zeros make a number OCTAL in php and 09 is not a valid OCTAL number so it is skipped. You should only apply leading zeros to a number when you display it.

[unibroue]

quick reply to this thread!

 

i have the same problem with that code :

 

$nextmonth = date("Y-n-d", mktime(0,0,0,date("n")+1,date("d"),date("Y")));

 

return october 1 insted of september 1 ...

 

...

[PFMaBiSmAd]

Also, when you specify a day number that does not exist in a specific month, it goes to the next month.

[unibroue]

Also, when you specify a day number that does not exist in a specific month, it goes to the next month.

 

That's the solution ... thanks!

[catchy]

@PFMaBiSmAd Thanks a million, I didn't know that about octal values and non-existent day numbers. This was code I've inherited, and it's way overcomplicated. Turns out this line (for months) does the trick:

 

date('m',mktime(0, 0, 0, $this_month, $this_day+$i, $this_year));

 

Thanks again.