Subtract time (hours, minutes, and seconds) from date can be easily done using the date() and strtotime() function in PHP. Updated March 26, 2017 Here are some examples by which you can add or subtract date. Date function is a very important function in any technology and in PHP it is quite easily understandable and In this post we are going to learn how to add days, weeks, months, year in PHP. In this tutorial, we’ll learn how to add or subtract days from the current date or date and time in PHP. We then use a print statement to … When PHP comes across the minus sign, it does the subtraction for you, and puts the answer into the variable on the left of the equals sign. It stores users date of births. It does this by converting until the first non-number. Date Calculator: Add to or Subtract From a Date. Enter a start date and add or subtract any number of days, months, or years. Two methods we are going to described in this post. You can use strtotime() or DateTime class on your choice. I want to subtract one column from the other to measure the days between the dates. e.g these simple codes can find the 2 week before or after date. I need to calculate in a PHP script, the users age from this DOB. I get a PHP date in the same format as the mySQL and subtract, which returns the year rounded off. The dates are simply strings when you first subtract them. Examples: Input: start_date: 2016-06-01 22:45:00 end_date: 2018-09-21 10:44:01 Output: 2 years, 3 months, 21 days, 11 hours, 59 minutes, 1 seconds Input: start_date: 2015-05-12 12:37:30 end_date: 2018-04-25 12:45:31 Output: 2 years, 11 months, 19 days, 0 hours, 8 minutes, 1 seconds If you are using PHP 5.3+ version, than simply add and subtract method work for it.. See below example to Add 2 Day interval in date. Both methods belong to DateTime object itself. Add days to date; Subtract days from date; Here, we will explain the simple way to do this task with example. PHP attempts to convert them to integers. Using php date() and strtotime() function we can easily add or subtract days, month and year to a given date.date() function formats a local date and time and returns the formatted date string. In this article, I described the simple process about how to add and subtract number of days from current date using default PHP date() function. Given two dates, start_date and end_date. I'm assuming creating a measure is the best approach...not sure how to do this. Adding or subtracting interval to a DateTime instance is quite easy. Adding dates is easy in PHP and once you come to know this you don’t need to memorize at all. The task is to find the difference between two dates. The date() function formats a local date and … Parse, validate, manipulate, and display dates in PHP w/ i18n support. 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