Twig date difference

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Since PHP 5.3 There is another option without to write an extension.

This example show how to calc the plural day/days

{# endDate and startDate are strings or DateTime objects #}
{% set difference = date(endDate).diff(date(startDate)) %}
{% set leftDays = difference.days %}
{% if leftDays == 1 %}
  1 day
{% else %}
  {{ leftDays }} days
{% endif %}

Explanation:

PHP 5.3 DateTime object has diff() method which return a DateInterval object with the result difference between endDate and beginDate
Twig

Twig date function always return a DateTime object so we can call diff method

Finally we can access to the properties of the DateInterval object or format it with the Twig date filter.

Note: There is no need of wrap endDate or startDate with the date function if the variable is already a DateTime object.

Note2: DateTime is used here as a synonym of DateTimeInterface.

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