Comparing two dates in PHP is simple when both the dates are in the same format but the problem arises when both dates are in a different format. I needed to get the exact number of days between 2 dates and was relying on the this diff function, but found that I was getting a peculiar result with: For those like me who don't yet have PHP 5.3 installed on their host, here's a simple alternative to get the number of days between two dates in the format '2010-3-23' or similar acceptable to strtotime(). Keep in mind that diff will convert the two DateTime objects from local time to UTC. date ('Y - m - d'). '';?> in the "datetime" attribute you should put a machine-readable value which represent time , the best value is a full time/date with ISO 8601 ( date('c') ) ,,, the attr will be hidden from users and it doesn't really matter what you put as a shown value to the user,, any date/time format is okay !

http://php.net/manual/en/migration71.incompatible.php Returns the difference between two DateTime objects date ('c'). Method 1: If the given dates are in the same format then use a simple comparison operator to compare the dates. At PHP 7.1 the DateTime constructor incorporates microseconds when constructed from the current time. Be careful, the behaviour depends on the time zones in a weird way. Make your comparisons carefully, since two DateTime objects constructed one after another are now more likely to have different values. So this function is not available for my server's PHP. If you want to quickly scan through the resulting intervals, you can use the undocumented properties of DateInterval.

I created an alternative. Should the interval be forced to be positive?

However, under PHP 5.6, the fraction is truncated. I found that DateTime::diff isn't as accurate as I thought. Similar to what was mentioned by  ianlenmac at gmail dot com /*small script to check if the given date is between the limit "Enter a date within next %d days the difference is %d" The instantiation is easy: you can pass to the constructor a date correctly formatted, or nothing if you want to use the actual date and time.Here the list of supported date and time formats you can inject in the constructor.You can then format the date in order to display it, in two lines of code:Output: 2016-01-01 00:00:00Output: whatever the current date is, correctly formatted.Easy, isn’t it? For example: date_default_timezone_set('Europe/Oslo'); The return value more specifically represents the interval to apply to the Therefore I hope this can help some others: Heure du moment. You can as well precise the timezone you want as a second argument: Liste de paramètres object.

You need PHP 5.2. Example: I hope this helps you. It is worth noting, IMO, and it is implied in the docs but not explicitly stated, that the object on which diff is called is subtracted from the object that is passed to diff.

When getting the difference between two DateTime objects with fractions of seconds, DateTime::diff() works under PHP 7.1. After wrestling with DateTime::diff for a while it finally dawned on me the problem was both in the formatting of the input string and the formatting of the output. If you filter your data in the query then less, or no time is spent transferring superfluous data back to the application.

Be careful when using the difference between 'Now' and a future value. When I search and read code about time and date problems developers have, I noticed that a lot of people still use the old PHP functions like Now I see you asking: why using DateTime instead of a bunch of PHP date functions?The instantiation is easy: you can pass to the constructor a date correctly formatted, or nothing if you want to use the actual date and time.You can then format the date in order to display it, in two lines of code:Output: whatever the current date is, correctly formatted.You want to format an unreadable timestamp into a nice and shiny easy-to-read date?Obviously you can as well output a timestamp if you need to:What about adding or retrieving a day, a minute, an hour of a date?

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