Php 将日期时间舍入到最近的四分之一小时

如何将DateTime对象舍入到最接近的四分之一小时

---

因此：2011-05-30 09:11:00将四舍五入为2011-05-30 09:15:00，2011-05-30 09:47:00将四舍五入为2011-05-30 09:45:00，依此类推。

您可以提取分钟数，将其除以15，四舍五入，再乘以15。 差不多

// round the "minutes"
$quarter = round(date('i', $yourdate) / 15) * 15;
// get the new timestamp
$roundeddate = mktime(date("H",$yourdate), $quarter, date("s",$yourdate), date("n",$yourdate), date("j",$yourdate), date("Y",$yourdate));

---

如果四舍五入大于57分钟，这也会造成问题

试试这个

$current_date_time = '2014-04-14 00:58:01' ;

$current_date_time = round(strtotime($current_date_time) / (15 * 60)) * (15 * 60);

echo date('Y-m-d H:i:s', $current_date_time);

---

这就是我在代码中的实现方式。可能有更优雅/高效的方法，但这似乎是可行的

 // remove seconds from the datetime (we add them back later)
    $seconds = $preset_date->format("s");
    $preset_date->sub(new DateInterval("PT". $seconds ."S"));

    // grab the minutes
    $minutes = $preset_date->format("i");

    // add in the seconds as a fraction of a minute
    $minutes = $minutes + ($seconds/60);

    // get the mod of the minutes
    $minutes = $minutes % 15;

    // if the mod is greater than half way then
    // add enough minutes to make it to the next quarter hour
    if($minutes >= 7.5){
        // round up
        $diff = 15 - $minutes;
        $preset_date->add(new DateInterval("PT".$diff."M"));
    }else{
        // we are less than halfway so round down to previous quarter
        $preset_date->sub(new DateInterval("PT".$minutes."M"));
    }

---

用于任意舍入PHP日期时间的函数：