![]() ![]() Even though this produces 36, PHP will automatically work it out as if it was the 6th of July: " Įcho date("M d Y, H:i:s",mktime(13,56,04,06,18,2003))."" If you want to calculate a timestamp eighteen days beyond the one we generated in the above example, simply add eighteen to the days integer. The mktime() function makes date and time calculations easy through the use of integer parameters, and the ability to move out of a date scope. The last parameter is used for daylight saving time (1 for yes, 0 for no, -1 for PHP to calculate). You will notice that the order of the parameters is somewhat strange, and any of the parameters can be left out – those that are left out will be assumed from the current date. Mktime(hour,minute,second,month,day,year,is_dst) The mktime() function will accept up to seven parameters, all of which are integers: There will be instances when you will need to generate a timestamp based on a date/time in another format, such as those passed to you from another source, or from your database. Working from the opposite direction, we can generate a timestamp with the mktime() function. By subtracting the two timestamps, you can see how many seconds have elapsed, and once you have that, you can convert it into more friendly formats with some of the other functions provided by PHP. This provides you with an idea of how to perform date and time arithmetic. You can see how many seconds have passed since I wrote this by comparing the results you receive. This little script displayed “1062992346” for me. Returning the current timestamp is easy with the time() function: There is also a related gmdate() function, which is the same as date(), the difference being that it returns the Greenwich Mean Time. By default, the date function takes the current timestamp, but you can pass the function any timestamp you want: " ![]() The date function can also accept a timestamp (often called a Unix timestamp), which is the number of seconds since Janu(starting at 1 second after midnight). Play around with the various combinations., you will find that almost any possibility is available for use. The list above outlines all possible variations of the date/time. The offset for timezones west of UTC is always negative, and for those east of UTC is always positive.įollowing are some examples you can try, note the formatting characters added: " T => Timezone setting of this machine i.e. T => number of days in the given month i.e. S => English ordinal suffix, textual, 2 characters i.e. L => boolean for whether it is a leap year i.e. L => (lowercase ‘L’) day of the week, textual, long i.e. J => day of the month without leading zeros i.e. I => (capital i) “1” if Daylight Savings Time, “0” otherwise. G => hour, 24-hour format without leading zeros i.e. G => hour, 12-hour format without leading zeros i.e. “01” to “31”ĭ => day of the week, textual, 3 letters i.e. Following is a full list of the formatting options available:ĭ => day of the month, 2 digits with leading zeros i.e. ![]() You can also customize the output from the format string. String date ( string format )This function provides many possible formatting options. In simplified terms, passing a time parameter is optional-if you don’t, the current timestamp will be used. The date () function provides you with a means of retrieving the current date and time, applying the format integer parameters indicated in your script to the timestamp provided or the current local time if no timestamp is given. We will also introduce the time () function in detail, learning how to handle and manipulate the UNIX timestamp it returns. As we proceed, you will see that this function is very simple to use, and has many parameters available to it. It is a PHP function which returns the current date and time, and allows you to format the output as you like. The most commonly used function used when dealing with dates and time is the date () function. You have access to a server or servers running the PHP package. ![]() This tutorial assumes several things about the reader: This tutorial will concentrate on the time and date functions provided in PHP. ![]()
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