Analysis of the method of obtaining the number of days difference between a given date in php

The example in this article describes the method of obtaining the number of days from a given date in php. Share it with everyone for your reference, the details are as follows:

Method 1:

<?php
function count_days($a,$b){
 $a_dt=getdate($a);
 $b_dt=getdate($b);
 $a_new=mktime(12,0,0,$a_dt[&#39;mon&#39;],$a_dt[&#39;mday&#39;],$a_dt[&#39;year&#39;]);
 $b_new=mktime(12,0,0,$b_dt[&#39;mon&#39;],$b_dt[&#39;mday&#39;],$b_dt[&#39;year&#39;]);
 return round(abs($a_new-$b_new)/86400);
}
//今天与2017年8月26日相差多少天
$date1=strtotime(date("Y-m-d"));
$date2=strtotime(&#39;2017-8-26&#39;);
$result=count_days($date1,$date2);
echo $result;
?>

Running result: 187

Method 2:

<?php
//今天与2017年8月26日相差多少天
$Date_1=date("Y-m-d");
$Date_2="2017-8-26";
$d1=strtotime($Date_1);
$d2=strtotime($Date_2);
$Days=round(($d2-$d1)/3600/24);
echo "今天与2017年8月26日相差".$Days."天";
?>

Running result:

今天与2017年8月26日相差187天

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