在30分钟的间隙中的圆形时间串

Question

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 .

Answer 1

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