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PHP DateTime の差を小数点以下も含めて合計秒数を表示する

Last updated at Posted at 2020-01-30

環境

  • PHP 7.3

コード

$d1 = new DateTime('2020-01-01 12:00:00.123456');
$d2 = new DateTime('2021-02-03 14:50:06.654321');

$seconds = $d2->getTimestamp() - $d1->getTimestamp();
$decimal = $d1->diff($d2)->format('%f');
echo $seconds . '.' . $decimal;

// 34483806.530865

2020.01.30 追記

Carbonを使うとスマートに書けることを教えていただきました!

use Carbon\Carbon;

$d1 = new Carbon('2020-01-01 12:00:00.123456');
$d2 = new Carbon('2021-02-03 14:50:06.654321');

echo $d1->floatDiffInSeconds($d2);

// 34483806.530865

参考

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