Solved

Loop through interval of 5 minutes between two dates

Posted on 2010-09-08
10
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Last Modified: 2012-05-10
Hi,

I have a start date and end date. Let's say 08:15 and 17:00

I need to loop through the time between these two dates, by 5 minutes interval.

So the loop should give in this case:

08:15
08:20
08:25
08:30
08:35
08:40
etc. until
17:00

(any dates like 8:15 should be 0-padded to have 08:15)
(the start date and end date are multiple of 5, I will never have something like 08:13)

Thank you
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Comment
Question by:matthew016
10 Comments
 

Assisted Solution

by:nitinbabbar
nitinbabbar earned 50 total points
Comment Utility
If you want to do excute time triggered code (specially with PHP) you need to install a cron job server.
There are a few free cron job provider (Maybe you ask Dr. Google :) )
Here you can find a little tutorial:
http://www.webmasters-central.com/article-blog/tutorials/cron-tutorial-managing-cron-tab-or-cron-job-is-easy/

Greets
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LVL 9

Author Comment

by:matthew016
Comment Utility
This has nothing to do with Cron tasks.
0
 
LVL 12

Expert Comment

by:Rok-Kralj
Comment Utility
Ok, i assume the dates are in unix timestamp format. Otherwise you need to use mktime or strtotime functions.
$start=time();

$end=time()+10000;



while($start<$end) {

   $start=(floor($start/300)+1)*300;

   echo date('H:i', $start);

}

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LVL 12

Expert Comment

by:Rok-Kralj
Comment Utility
Example that fits you needs totally:
$start=strtotime('8:15');

$end=strtotime('17:00');



while($start<$end) {

	$start=ceil($start/300)*300;

	$start++;

	echo date('H:i', $start), "\n";

}

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Assisted Solution

by:johnwarde
johnwarde earned 50 total points
Comment Utility
Maybe I've read your requirements incorrectly but you did mention dates. This script cycles through you time interval and the date range, probably more than you need .  Would have been simpler if  DateInterval->days worked properly.

John
function isGreaterThanDate($objDateInterval) {

    if ($objDateInterval->invert == 0 &&

        $objDateInterval->y > 0 ||

        $objDateInterval->m > 0 ||

        $objDateInterval->d > 0) {

        return true;

    }

    return false;

}



$objStartDate = new DateTime('2010-02-15');

$objEndDate   = new DateTime('2010-04-15');

$objIntervalOneDay = new DateInterval('P1D');

$objEndDate->add($objIntervalOneDay);



while (isGreaterThanDate(date_diff($objStartDate, $objEndDate))) {

    $intStartTime = strtotime('8:15');

    $intEndTime = strtotime('17:00');

    while($intStartTime <= $intEndTime) {

        echo $objStartDate->format('Y-m-d ').date('H:i', $intStartTime), "<br/>\r\n";

        $intStartTime += 300;

        flush();

    }

    $objStartDate->add($objIntervalOneDay);

}

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LVL 12

Expert Comment

by:Rok-Kralj
Comment Utility
If you need dates too:
$start=strtotime('29.11.2011 8:15');

$end=strtotime('30.11.2011 17:00');



while($start<$end) {

	$start=ceil($start/300)*300;

	$start++;

	echo date('d.m.Y \a\t H:i', $start), "\n";

}

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Assisted Solution

by:Rok-Kralj
Rok-Kralj earned 200 total points
Comment Utility
@John: Your scipt fails bigtime if start time is let's say 8:12.

Mine works fine on all conditions.
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LVL 108

Accepted Solution

by:
Ray Paseur earned 200 total points
Comment Utility
PHP has some fairly sturdy built-in functions for this sort of thing.  Please see my article here:
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_201-Handling-date-and-time-in-PHP-and-MySQL.html

Best regards, ~Ray
<?php // RAY_temp_5minutes.php
error_reporting(E_ALL);
echo "<pre>";



function intervals($alpha, $omega, $interval="5 MINUTES")
{
    // NORMALIZE THE DATA
    $alpha = date('c', strtotime($alpha));
    $omega = date('c', strtotime($omega));

    // CREATE THE ARRAY OF INTERVALS
    $intvl = array();
    while ($alpha <= $omega)
    {
        $intvl[] = date("H:i", strtotime($alpha));
        $alpha = date('c', strtotime($alpha . " + $interval"));
    }
    return $intvl;
}



// SOME TEST DATA
echo PHP_EOL . var_dump(intervals("0800", "0830"));
echo PHP_EOL . var_dump(intervals("0800", "0803"));

echo PHP_EOL . var_dump(intervals("0802", "0829"));
echo PHP_EOL . var_dump(intervals("0805", "0905", "15 MINUTES"));


echo PHP_EOL . var_dump(intervals("Today 23:50:00", "Tomorrow 00:03:15", "1 MINUTE"));

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Assisted Solution

by:Rok-Kralj
Rok-Kralj earned 200 total points
Comment Utility
@Ray: You seem to love strtotime(); :)
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Author Closing Comment

by:matthew016
Comment Utility
Thank you !
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