Rounding minute to the nearest quarter of hour

[eldan88]

Hey Guys. I am new to using dates in PHP and have been playing a lot with the PHP functions that are available for the date and time. t

 

But I am stuck  on trying to figure out, how to display the minutes of the current time, so that it will round to the nearest  quarter of hour, based on the current time. Example would be:

 

1:15

1:30

1:45

 

I have a came a cross a function by doing some googling, and have came across the following function.

function roundToQuarterHour($timestring) {
    $minutes = date('i', strtotime($timestring));
    return $minutes - ($minutes % 15);
}

I then tried to implement doing with the following

$time =  time();
function roundToQuarterHour($time) {
    $minutes = date('i', strtotime($time));
    return $minutes - ($minutes % 15);
}
$rounded_time = roundToQuarterHour($time);
echo $rounded_time; 

It doesn't display anything. When i did a var_dump on the $rounded_time i got a int(0)

 

Not sure on how to go about this....Any help would really be appreciated!

[requinix]

If you got int(0) then the echo did output a 0. Somewhere.

 

By the way, if you didn't notice that code always rounds down the minutes. 1:29 will round to 1:15.

[eldan88]

Hey requinix. Thanks for your response. I understand it outputted a zero but, its supposed to out put the minutes. It outputs a zero regardless of what time it is.

[eldan88]

You are right ... It does round it down. Would have any suggestion on rounding it up?

Edited April 2, 2014 by eldan88

[Barand]

<?php

echo  roundToQuarterHour('2014-04-03 10:06:33');  // 2014-04-03 10:00:00 

echo  roundToQuarterHour('2014-04-03 10:11:33');  // 2014-04-03 10:15:00 

echo  roundToQuarterHour('2014-04-03 10:18:33');  // 2014-04-03 10:15:00 

echo  roundToQuarterHour('2014-04-03 10:24:33');  // 2014-04-03 10:30:00 


function roundToQuarterHour($tstr) {

    $t = round(strtotime($tstr)/900)*900;

    return date('Y-m-d H:i:s', $t);

}


?>

[eldan88]

Hey Barand. Thank you so much for providing me a working example. But for future references would be able to explain me how you did the math? Just so that I can get an idea on how to implement in the future. That would be really helpful for me then just copying and pasting. Thanks

[Barand]

Round the number of seconds to nearest 900