![]() You can instantiate a new DateTime object using the DateTime() constructor. The difference between object-oriented style and procedural style becomes more obvious when subtracting or adding a time interval. This interval can be formatted to give a specific output using all the characters listed in the format() method documentation. When you are writing procedural style code, the first date parameter is subtracted from the second date parameter.īoth the function and the method return a DateInterval() object representing the difference between two dates. When using DateTime::diff(), the DateTime object on which the diff() method is called is subtracted from the DateTime object which is passed to the diff() method. Output - 05 years, 04 months and 17 daysĮcho $interval -> format ( '%Y years, %M months and %d days' ) $interval = $present -> diff ( $future ) $future = new DateTime ( 'last day of January 2024' ) format ( '%Y years, %M months and %d days' ) We'll try both these styles here, and you can choose whichever you like the most. Generally, it's easier to do any such date and time related arithmetic in object-oriented style with the DateTime class instead of doing it procedurally. You can also use the date_diff() function to subtract two dates and output the difference between them in terms of years, months, and days, or something else. This can be done with the help of the date_add() and date_sub() functions. ![]() It's possible to add and subtract specific periods of time to and from a date. This function can also be used with date() to generate useful date and time strings. When all the parameters are omitted, this function just uses the current local date and time to calculate the timestamp value. This means that at a particular point in time, this function will return the same value in the US, Europe, India, or Japan.Īnother way to get the timestamp for a particular date would be to use the mktime($hour, $minute, $second, $month, $day, $year) function. One important thing you should remember is that the timestamp value returned by time() is time-zone agnostic and gets the number of seconds since 1 January 1970 at 00:00:00 UTC. We can use it to get the current year, current month, current hour, etc., or we can use it to get a complete date string. Let's see some practical examples of the date() function now. It is best to consult the format characters table in the date() function documentation for more information about special cases. There are many other special characters to specify the output for the date() function. Characterĭay of the week as a three-letter abbreviation Here are some of the most common date format characters and their values. Similarly, H will give you the hour in 24-hour format with leading zeros, but h will give you the hour in 12-hour format with leading zeros. Some of these characters have straightforward meanings: Y gives you the full numeric representation of the year with 4 digits (2018), and y only gives you the last two digits of the current year (18). The $format parameter accepts a series of characters as valid values. The second parameter is optional, and omitting it will output the current date and time in string format based on the value of $format. It takes the desired output format for the date as the first parameter and an integer as a timestamp value which needs to be converted to the given date format. Getting the Date and Time in String Formatĭate($format, $timestamp) is one of the most commonly used date and time functions available in PHP. You will also learn how to get the timestamp from a date string and how to add and subtract different dates. This tutorial will teach you how to format the current date and time in PHP. Luckily, PHP comes with some built-in date and time functions which will help us do all that and much more quite easily. You might also have to show a countdown of the days until a special event. For example, you might need to show the last modified date on a post or mention how long ago a reader wrote some comment. You'll often want to work with dates and times when developing websites.
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