php 计算两个日期 时间差 展示天时分秒

use DateTime;

$start_date="2022-07-13 08:50:00";//开始时间
$end_date="2022-07-14 12:12:12";//结束时间

echo "开始时间：".$start_date."<br><br>";
echo "结束时间：".$end_date."<br><br>";

$start_date = new DateTime($start_date);
$since_start = $start_date->diff(new DateTime($end_date));
//echo "相差年数：".$since_start->y.'年<br>';
//echo "相差月数：".$since_start->m.'月<br>';
echo "相差天数：".$since_start->d.'天<br>';
echo "相差小时数：".$since_start->h.'小时<br>';
echo "相差分钟数：".$since_start->i.'分钟<br>';
echo "相差秒数：".$since_start->s.'秒<br>';