Rob Rob - 4 years ago 142
PHP Question

Round minute down to nearest quarter hour

I need to round times down to the nearest quarter hour in PHP. The times are being pulled from a MySQL database from a datetime column and formatted like

2010-03-18 10:50:00


  • 10:50 needs to be 10:45

  • 1:12 needs to be 1:00

  • 3:28 needs to be 3:15

  • etc.

I'm assuming
is involved but not sure how to go about it.


Answer Source

Your full function would be something like this...

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