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How do I find next day date by end time ?

Posted on 2014-09-29
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Last Modified: 2014-10-01
I have db with these details

Title (text)
Date Start Time (Timestamp)
Date End Time  (Timestamp)

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I will get input as

"This is title"
09/29/2014
11:55 PM
03:35 AM

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Now I need to calculate based on end time "03:35 AM".. the next day as "09/30/2014"?

How can I do this?

attached are my sample input screen.
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Question by:Loganathan Natarajan
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by:Ray Paseur
Ray Paseur earned 500 total points
ID: 40349913
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by:Ray Paseur
ID: 40349919
Now I need to calculate based on end time "03:35 AM".. the next day as "09/30/2014"?
How do you figure out that the next day is 09/30/2014?  Is this value always the current date + 1 day?  Give us a little more to go on, and I'll be glad to show you the calculations (or just read the article and you'll find many examples of date/time arithmetic).
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by:Loganathan Natarajan
ID: 40350254
Thanks Ray, let me go through your article first.
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Expert Comment

by:Ray Paseur
ID: 40350338
OK.  Once we know the rules for interpreting the times, it should be pretty easy to get the code together.
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Author Comment

by:Loganathan Natarajan
ID: 40351497
I read the tutorial , it is useful and more details to work further. Thanks Ray.

but in my case different, just check the attachment screen. the input comes always one DATE and FROM, TO time ...

So, what is the best way to validate in my case?
doubt.png
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Accepted Solution

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Ray Paseur earned 500 total points
ID: 40352087
I'll try to show you what I think might work.  Install this script and run it, or test on my server here.
http://iconoun.com/demo/temp_loganathan.php
<?php // demo/temp_loganathan.php
error_reporting(E_ALL);
if (!empty($_GET))
{
    // INTERPRET THE DATES INTO TIMESTAMPS AND ISO-8601 DATETIME VALUES
    $alpha = date('c', strtotime($_GET['d'] . ' ' . $_GET['a']));
    $omega = date('c', strtotime($_GET['d'] . ' ' . $_GET['z']));

    // IF THE END DATE/TIME IS EARLIER THAN THE START, ADD A DAY
    if ($omega < $alpha) $omega = date('c', strtotime($omega . ' + 1 DAY'));

    // SHOW THE UNDERSTANDING OF THE DATES
    echo "Alpha: $alpha, Omega: $omega";
}

// CREATE THE FORM FOR INPUTS
$form = <<<EOF
<form>
Date:  <input name="d" /><br>
Start: <input name="a" /><br>
End:   <input name="z" /><br>
<input type="submit" value="Go!" />
</form>
EOF;
echo $form;

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Author Comment

by:Loganathan Natarajan
ID: 40353936
Thanks ray. It is very helpful and fixed it.
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Expert Comment

by:Ray Paseur
ID: 40354228
Great!  Thanks for the points, ~Ray
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