future date function

[BoarderLine]

Hi, I am using this function to output a list of dates for every friday over the next 12months. This is working fine.

 

[code=php:0]
//function
function nextWeeksDay($date_begin,$nbrweek)
{
$nextweek=array();
for($i = 1; $i <= $nbrweek; $i++)  { // 52 week in one year of course
$nextweek[$i]=date('Y-m-d', strtotime('+'.$i.' week',$date_begin));
}
return $nextweek;
}
/// end function 
/// example of a select date 
// var
$date_begin=strtotime('this Friday');
$nbrweek=52;
// call function
$result=nextWeeksDay($date_begin,$nbrweek);
// Insert
//$date1=date('Y-m-d', $date_begin);
for($i = 1; $i <= $nbrweek; $i++)  {
//$date=$result[$i];
echo $result[$i]."<br/>";
}

[/code]

 

My problem is that when I alter the code to try and get the date for every second Friday for the next year the script freezes.

 

[code=php:0]
//function
function nextWeeksDay($date_begin,$nbrweek)
{
$nextweek=array();
for($i = 2; $i <= $nbrweek; $i+2)  { // 52 week in one year of course
$nextweek[$i]=date('Y-m-d', strtotime('+'.$i.' week',$date_begin));
}
return $nextweek;
}
/// end function 
/// example of a select date 
// var
$date_begin=strtotime('this Friday');
$nbrweek=52;
// call function
$result=nextWeeksDay($date_begin,$nbrweek);
// Insert
//$date1=date('Y-m-d', $date_begin);
for($i = 2; $i <= $nbrweek; $i+2)  {
//$date=$result[$i];
echo $result[$i]."<br/>";
}

[/code]

 

I really don't understand why??  Does anyone know why?

 

Thanks

 

[BoarderLine]

Sorry forgot to add im using PHP version 5.3.3

[PaulRyan]

I believe you are looking for something like this function...

 

 

<?php  function get_date($month, $year, $week, $day) {    # $month, $year: current month to search in    # $week: 0=1st, 1=2nd, 2=3rd, 3=4th, -1=last    # $day:  0=mon, 1=tue, 2=wed, 3=thu, 4=fri, 5=sat, 6=sun    $startday = '1';     $delta    = '0';    if($week < '0'){      $startday = date('t', mktime(0, 0, 0, $month, 1, $year)); # 28..31      $delta    = '1';    }    $start  = mktime(0, 0, 0, $month, $startday, $year);    $dstart = date('w', $start)-1; # last of the month falls on 0=mon,6=sun    $offset = $day-$dstart; if ($offset<$delta){$offset+=7;}    $newday = $startday+$offset+($week*7);    return $month.'-'.$newday.'-'.$year;  }echo get_date('10', '2010', '1', '4');  ?>

 

 

That should get you heading the in right direction.

You will now need to make a while loop and then use the echo part in your loop and change the month and year accordingly.

 

Hope this helps.

 

Regards, Paul.

[BoarderLine]

Thanks Paul,  I will look into this as an alternate.  However I would love to know why the function is not working as surely all logic suggests that if the the function is working correctly incrementing by +1 weeks it should also work incrementing by +2 weeks should it not?

[PaulRyan]

In theory it should work, but in practice it doesn't.

Your first function is using every week for 52 weeks.

Your second function is using every 2 weeks for 52 weeks, so you aren't getting the desired result.

 

I will take a proper look at your code and try to figure somthing out.

 

Regards, Paul.

[BoarderLine]

Still can't find a solution here.  I have tried changing number of weeks, incrementing by anything other than +1 but for some reason the script is freezing like it is causing a continuous loop.  I have tidied up the trouble code below as the original above was a bit messy.  Any assistance on what may be causing this issue or a way to debug this script is appreciated as this is causing me serious pain. 

 

[code=php:0]
# function
function nextWeeksDay($date_begin,$nbrweek)
{
$nextweek=array();
for($i = 2; $i <= $nbrweek; $i+2)  { # 52 week in one year of course
$nextweek[$i]=date('Y-m-d', strtotime('+'.$i.' week',$date_begin));
}
return $nextweek;
}
# end function
# example of a select date
$date_begin=strtotime('this Friday');
$nbrweek=52;
# call function
$result=nextWeeksDay($date_begin,$nbrweek);
for($i = 2; $i <= $nbrweek; $i+2)  {
echo $result[$i]."<br/>";
}

[/code]

[BoarderLine]

So it seems trying to increment by +2 was just causing $date_begin to repeat in a constant loop (obviously as it was never reaching <= $nbrweek.

 

Ugly I know however the only way I could get it to work was by doing this:

 

[code=php:0]
$date_begin=strtotime('this Friday');
$nbrweek=52;
$i = 0;
do  { # 52 week in one year of course
$nextweek[$i]=date('Y-m-d', strtotime('+'.$i.' week',$date_begin));
echo $nextweek[$i].'<br/>';
$i++;
$i++;
} while ($i <= $nbrweek);
exit;

[/code]

[DavidAM]

You're not actually incrementing $i, so the loop will never end

 

// THIS
for($i = 2; $i <= $nbrweek; $i+2)  { # 52 week in one year of course
// SHOULD BE THIS
for($i = 2; $i <= $nbrweek; $i+=2)  { # 52 week in one year of course

[BoarderLine]

Legend David thanks so much.

[pkphp]

elegant scripts. do you mind i take to my projects ? lol