How to Calculate Date and Time Difference using date_diff in PHP ?

There are several ways to calculate the date and time in PHP. So lets discuss each in detail .
Lets talk about Calculating the Date and Time Difference using date_diff :

It is the most easy way to calculate Date and Time Difference in php .

General Syntax : 

<?php date_diff($dt1, $dt2); ?>

 Here ,

$start_date  = date_create('1985-11-30');
$end_date   = date_create(); // Current time and date
$diff   = date_diff( $start_date, $end_date );
echo 'The difference is ';
echo  $diff->y . ' years, ';
echo  $diff->m . ' months, ';
echo  $diff->d . ' days, ';
echo  $diff->h . ' hours, ';
echo  $diff->i . ' minutes, ';
echo  $diff->s . ' seconds';
echo "<br/>"
echo 'The difference in days : ' . $diff->days;

Output : The difference is 32 years, 8 months, 30 days, 11 hours, 16 minutes, 25 secondsThe difference in days : 11960

The arguments, $datetime_start and $datetime_end must be an object of DateInterval class, and can be achieved using date_create() function.

The arguments supplied does not have the order from small to large , we can also add the large date to fitst and small date to last arguments , the result will be same

$diff  = date_diff( $end_dt, $start_dt );

The result produce by the date_diff() is the DateInterval object ,  which have many properties and can be observed by echo <pre>; print_r ($diff)

Formatting the Output

DateInterval object as the result of date_diff() function has a method named format() that can be used to produce the output with a specific format, for example:

$diff  = date_diff( date_create('1985-11-30'), date_create() );
echo $diff->format('Your age is %Y years and %d days'); 

Output : Your age is 32 years and 30 days


    In order to translate the date_diff() in to characters use  percent sign (%) at begning as example from above %Y and %d

  •     Year : Y stands for the four-digit year, and y stands for the two digits of the years.
  •     Month : M stands for 2-digit month, and m stands for one-two digit months.
  •     Date : D stands for 2-digit dates, and d stands for one-two digit of the dates.
  •     Today : A stands for a total different time of day. Example:

    $diff = date_diff(date_create (‘1985-11-30’), date_create ());
    echo $diff->format (‘Your age is %a day’); // Your age is 11960 day

  •     Hours : H stands for 2 digit hours, and h stands for one-two digit hours.
  •     Minutes : I stands for 2 digit minutes, and i stands for one-two digit minutes.
  •     Seconds : S  stands for 2 digit seconds, and s stands for one-two digit seconds.

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