find what months a date range covers

[searls03]

I am looking for a way to grab a start date and an end date from my database, and find out what months of what years the range covers.  So for example, I have a march 15 2013 startdate, and a june 4 2013 enddate.  I would like something that could tell me that this range covers march 2013, april 2013, may 2013, and july 2013.  I know I could use a timestamp to find if a date falls within a specified month, but I can't figure out how I would reverse that into a months covered by range.  any help is appreciated.

[teynon]

Here is how you might do it

 

1) Start date. Get year and month. EX: 2012 / 01

 

2) End Date. Get year and month. EX: 2013 / 02

 

Psuedo code

date = start date

while (date <= endDate) {
    monthsCovered[] = date('month');
    date = date + 1 month
}

[Barand]

Be careful when adding "1 month"

 

Jan 31 + 1 month = Mar 3

[searls03]

thats a good point, what is the best way to fix this?

[Jessica]

$months = array(1=>'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sept', 'Oct', 'Nov', 'Dec');

$end_m = date('n', $end);

$start_m = date('n', $start);

if($end_m >= $start_m){

   $month_range = array_slice($months, $start_m, $end_m);

}else{

   $month_range = array_merge(array_slice($months, $start_m), array_slice($months, 0, $end_m);

}

Not tested, and only supports 11 months or less range.

[teynon]

You start with the year and month as the start date. No day involved. Or default to 1 for day.

[teynon]

Decided to have a little fun with this one.

<?php
    if (!interface_exists("Object_Array")) {
        // Blend the interfaces.
        interface Object_Array extends Iterator, Countable {
        }
    }
    class dateRange implements Object_Array {
        private $stopDate, $startDate, $pointer, $mode;
        public $output;
        
        public function __construct($start, $stop, $mode = "month", $output = "F Y") {
            $this->startDate = strtotime($start);
            $this->stopDate = strtotime($stop);
            $this->pointer = $this->startDate;
            $this->mode = $mode;
            $this->output = $output;
        }
        
        public function current() {
            return date($this->output, $this->pointer);
        }
        
        public function key() {
            return $this->pointer;
        }
        
        public function next() {
            switch ($this->mode) {
                default: // Get next month
                    $this->pointer = mktime(0,0,0, date("m", $this->pointer) + 1, 1, date("Y", $this->pointer));
                    break;
            }
        }
        
        public function rewind() {
            $this->pointer = $this->startDate;
        }
        
        public function valid() {
            if ($this->pointer <= $this->stopDate) {
                return true;
            }
            return false;
        }
        
        public function count() {
            $total = 0;
            switch ($this->mode) {
                default:
                    $start = $this->startDate;
                    while ($start < $this->stopDate) {
                        $start = mktime(0, 0, 0, date("m", $start) + 1, 1, date("Y", $start));
                        ++$total;
                    }
                    break;
            }
            
            return $total;
        }
    }
    
    $date = new dateRange("1/31/2010", "5/31/2012");
    
    foreach ($date as $monthYear) {
        echo $monthYear . "<br />";
    }
    
    echo count($date);

[Barand]

try

$start = new DateTime('2013-01-31');
$end = new DateTime('2013-06-01');

$inc = DateInterval::createFromDateString('first day of next month');
$end->modify('+1 day');

$p = new DatePeriod($start,$inc,$end);

foreach ($p as $d)
 echo $d->format('M') . '<br>';

 

RESULTS:

 

Jan
Feb
Mar
Apr
May
Jun

[teynon]

Use what Barand posted, way more functional than mine.

[Jessica]

I really need to learn to use the new DateInterval stuff. Very cool.

[searls03]

barand, is there something I need to edit in the code you posted?  not for sure.  but I am receiving no results

[searls03]

I thought I would be able to figure this stuff out, but here is what my ultimate goal is.  I am building a member registration system and I found this code from someone else on here that does exactly what I had been looking for for a pagination of months.

 

$offset = isset($_GET['offset']) ? intval($_GET['offset']) : 0;
$currMonth = date('n');

$list = array();
$list[] = mktime(0, 0, 0, $currMonth+$offset, 1);
$list[] = mktime(0, 0, 0, $currMonth+$offset+1, 1);
$list[] = mktime(0, 0, 0, $currMonth+$offset+2, 1);

foreach ($list as $dateTS)
{
   echo date('M Y', $dateTS) . '<br />';
}

$prev = $offset-3;
$next = $offset+3;
echo "<br><a href='?offset={$prev}'>Prev</a> <a href='?offset={$next}'>Next</a>"

 

 Any ways, what this does is creates a list of three months with pagination for moving onto next three months or previous three months.  I then am trying to build this piece of code from this topic, where it will find all events that fall underneath of the proper month(s).  So I have an event called test1 with the dates of 3/15/2013 to 7/18/2013.  What I then want it to do is display in a list like this

 

Page 1

March 2013(heading from code I provided)

          3/15/2013 - 7/18/2013 Test1

April 2013

          3/15/2013 - 7/18/2013 Test1

May 2013

          3/15/2013 - 7/18/2013 Test1

 

Page 2

June 2013

          3/15/2013 - 7/18/2013 Test1

July 2013

          3/15/2013 - 7/18/2013 Test1

August

       Left blank

 

my table structure has start and end date and event name and id.  

[searls03]

there may be an easier way to do this than what I am trying to do by combining a bunch of codes into one

[teynon]

barand, is there something I need to edit in the code you posted?  not for sure.  but I am receiving no results

What version of PHP are you using?

[searls03]

5.3.6

[teynon]

If I cut and paste exactly what Barand posts, it works fine for me. PHP.net says all those classes are available in 5.3. Are you getting an error? Do you know how to turn errors on?

[searls03]

it is returning no errors

[teynon]

Do you get a blank white page? I'm gonna start offering this more often: https://chrome.google.com/remotedesktop

 

If you want me to walk through what's going on and figure it out quick for you, install that in Chrome and send me a PM and i'll walk through it with you.

[searls03]

yes, I am getting a blank white page.  I prefer not do do the remotedesktop...I am just sort of paranoid that way if you know what I mean

[teynon]

Alright, then I suggest you read some of the articles in Jessica's signature.

 

Debugging Your Code: Debugging your SQL | use print_r() or var_dump() | What does a php function do? | What does a term mean? | Don't see any errors?

[searls03]

ok Ill take a look

[searls03]

ok, I finally got some error messages, this is what I received:

 

Warning: Unknown: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Los_Angeles' for 'PST/-8.0/no DST' instead in Unknown on line 0

Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct() [<a href='datetime.--construct'>datetime.--construct</a>]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Los_Angeles' for 'PST/-8.0/no DST' instead' in /ssl/index.php:13 Stack trace: #0 /ssl/index.php(13): DateTime->__construct('2013-01-31') #1 {main} thrown in /ssl/index.php on line 13

[searls03]

got it!!!!

 

 

date_default_timezone_set('America/Los_Angeles');

 

$start = new DateTime('2013-01-31');

$end = new DateTime('2013-06-01');

 

$inc = DateInterval::createFromDateString('first day of next month');

$end->modify('+1 day');

 

$p = new DatePeriod($start,$inc,$end);

 

foreach ($p as $d)

  echo $d->format('M') . '<br>';

[searls03]

if you have any advice on how I could make this work with my registration system, that would be so awesome now that we got this working:)  thanks for your help on getting it working

[teynon]

Congrats. You can set that in your php.ini as well.http://php.net/manual/en/datetime.configuration.php