CODEWITHSUNDEEP
php
Rohit Kishore
Rohit Kishore

Reputation: 542

Round time string in gap of 30 minutes

I have a time string in UNIX format . I need to round that string to closest interval of 30 minutes.

For eg: I have time as 9:20 AM than it should round it to 9:30 AM.

If minutes are greater than 30 like 9:45 AM it should round to 10:00 AM.

I have tried this so far:

$hour = date('H', $ltdaytmfstr);
$minute = (date('i', $ltdaytmfstr)>30)?'00':'30';
echo "$hour:$minute";

$ltdaytmfstr is time string in unix format.

Any suggestions? It would be better if I can get the value returned in UNIX format .

Upvotes: 3

Views: 1923

Answers (4)

Mason.Chase
Mason.Chase

Reputation: 905

I guess this is what you are looking for

function round_timestamp($timestamp){
  $hour = date("H", strtotime($timestamp));
  $minute = date("i", strtotime($timestamp));

  if ($minute<15) {
    return date('H:i', strtotime("$hour:00") );
  } elseif($minute>=15 and $minute<45){
    return date('H:i', strtotime("$hour:30") );
  } elseif($minute>=45) {
    $hour = $hour + 1;
    return date('H:i', strtotime("$hour:00") );
  }
}

echo round_timestamp("11:59");
// 00:00
echo round_timestamp("10:59");
// 11:00

Upvotes: 2

NID
NID

Reputation: 3294

You should try this: This will round it to the nearest half an hour.

Use ceil function.

<?php

 $rounded = date('H:i:s', ceil(strtotime('16:20:34')/1800)*1800);
 echo $rounded;


?>

Output: 16:30:00

http://codepad.org/4WwNO5Rt

Upvotes: 6

apokryfos
apokryfos

Reputation: 40683

If you use DateTime:

$dt = new \DateTime;
$diff = $dt
          ->add( 
               //This just calculates number of seconds from the next 30 minute interval
               new \DateInterval("PT".((30 - $dt->format("i"))*60-$dt->format("s"))."S")
          );

 echo $dt->getTimestamp();

Upvotes: 2

sidyll
sidyll

Reputation: 59287

Since UNIX time is in seconds, you can just transform it to 30 minute units, round, and convert back to seconds.

$timestamp = time();
$rounded = round($timestamp / (30 * 60)) * 30 * 60

You can also use floor() or ceil() to round up or down if needed.

Upvotes: 1

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