How to calculate the difference between dates in php

php method to calculate the number of days difference between dates: first create a PHP sample file; then define two times and dates; then calculate through the "round(($d2-$d1)/3600/24);" method The difference between the two dates is only a few days.

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php calculates the number of days between dates

<?PHP
//今天与2004年10月27日相差多少天
$Date_1=date("Y-m-d");
$Date_2="2004-10-27";
$d1=strtotime($Date_1);
$d2=strtotime($Date_2);
$Days=round(($d1-$d2)/3600/24);
Echo   "今天与2004年10月27日相差".$Days."天";
Echo "<br>";
//今天到2008年9月9日还有多少天
$Date_1=date("Y-m-d");
$Date_2="2008-09-09";
$d1=strtotime($Date_1);
$d2=strtotime($Date_2);
$Days=round(($d2-$d1)/3600/24);
Echo   "今天到2008年9月9日还有".$Days."天";
?>
//---------------------------------------------
                   $arrayStartDate =explode("/",$myStartDate);
                   $arrayEndDate = explode("/",$myEndDate);
                  
                   $jdStartDate = cal_to_jd(CAL_GREGORIAN,$arrayStartDate[1],$arrayStartDate[0],$arrayStartDate[2]);
                   $jdEndDate = cal_to_jd(CAL_GREGORIAN,$arrayEndDate[1],$arrayEndDate[0],$arrayEndDate[2]);
      
                    $duration = $jdEndDate - $jdStartDate + 1;

Statistics of data that will expire in a few days

datediff(yxdate_star,now())

Return number of days = yxdate_star-now()

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