Get a PHP Datetime Difference in Days, Considering Midnight as a Day Change

Get a PHP DateTime difference in days, considering midnight as a day change

You could ignore the time portion of the date string

$date1 = new DateTime(date('Y-m-d', strtotime("2013-08-07 13:00:00")));
$date2 = new DateTime(date('Y-m-d', strtotime("2013-08-08 12:00:00")));
echo $date1->diff($date2)->days; // 1

Find difference between two datetimes and format at Y-m-d H:i:s

I'm not sure what format you're looking for in your difference but here's how to do it using DateTime

$datetime1 = new DateTime();
$datetime2 = new DateTime('2011-01-03 17:13:00');
$interval = $datetime1->diff($datetime2);
$elapsed = $interval->format('%y years %m months %a days %h hours %i minutes %s seconds');
echo $elapsed;

Finding the number of days between two dates

$now = time(); // or your date as well
$your_date = strtotime("2010-01-31");
$datediff = $now - $your_date;

echo round($datediff / (60 * 60 * 24));

Check specific day greater than 30 days from today using php

Try this

$date1=date_create('20160315');
$date2=date_create('20160115');
$diff=date_diff($date1,$date2);
$days = $diff->format("%a");

if($days > 30) do something

How can I calculate the number of working days between two dates

May be this code snippet will help:

<?php
//get current month for example
$beginday = date("Y-m-01");
$lastday  = date("Y-m-t");

$nr_work_days = getWorkingDays($beginday, $lastday);
echo $nr_work_days;

function getWorkingDays($startDate, $endDate)
{
    $begin = strtotime($startDate);
    $end   = strtotime($endDate);
    if ($begin > $end) {
        echo "startdate is in the future! <br />";

        return 0;
    } else {
        $no_days  = 0;
        $weekends = 0;
        while ($begin <= $end) {
            $no_days++; // no of days in the given interval
            $what_day = date("N", $begin);
            if ($what_day > 5) { // 6 and 7 are weekend days
                $weekends++;
            };
            $begin += 86400; // +1 day
        };
        $working_days = $no_days - $weekends;

        return $working_days;
    }
}

Another solution can be:
Get date range between two dates excluding weekends

Date difference in Javascript (ignoring time of day)

If you want whole days for your student camera rental example ...

function daysBetween(first, second) {

    // Copy date parts of the timestamps, discarding the time parts.
    var one = new Date(first.getFullYear(), first.getMonth(), first.getDate());
    var two = new Date(second.getFullYear(), second.getMonth(), second.getDate());

    // Do the math.
    var millisecondsPerDay = 1000 * 60 * 60 * 24;
    var millisBetween = two.getTime() - one.getTime();
    var days = millisBetween / millisecondsPerDay;

    // Round down.
    return Math.floor(days);
}

How to calculate number of days between two dates?

Here is a quick and dirty implementation of datediff, as a proof of concept to solve the problem as presented in the question. It relies on the fact that you can get the elapsed milliseconds between two dates by subtracting them, which coerces them into their primitive number value (milliseconds since the start of 1970).

/**
 * Take the difference between the dates and divide by milliseconds per day.
 * Round to nearest whole number to deal with DST.
 */
function datediff(first, second) {        
    return Math.round((second - first) / (1000 * 60 * 60 * 24));
}

/**
 * new Date("dateString") is browser-dependent and discouraged, so we'll write
 * a simple parse function for U.S. date format (which does no error checking)
 */
function parseDate(str) {
    var mdy = str.split('/');
    return new Date(mdy[2], mdy[0] - 1, mdy[1]);
}

alert(datediff(parseDate(first.value), parseDate(second.value)));

<input id="first" value="1/1/2000"/>
<input id="second" value="1/1/2001"/>

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