date() function in PHP
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Optional integer Return value: The absolute value of the number. For example, you might need to show the last modified date on a post or mention how long ago a reader wrote some comment. The timestamp that you see in the previous paragraph is generated by a very small line of code: The time function can also return a modified timestamp.
Currently there is no other solution than using a separate parsing library to get correct dates. The offset for timezones west of UTC is always negative, and for those east of UTC is always positive. You can also use this function to go back and forth in time.
date() function in PHP - 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.
You'll often want to work with dates and times when developing websites. 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 might also have to show a countdown of the days until a special event. Luckily, PHP comes with some built-in date and time functions which will help us do all that and much more quite easily. This tutorial will teach you how to format the current date and time in PHP. You will also learn how to get the timestamp from a date string and how to add and subtract different dates. 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. 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. 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. Here are some of the most common date format characters and their values. Character Meaning Example d day of the month with leading zeros 03 or 17 j day of the month without leading zeros 3 or 17 D day of the week as a three-letter abbreviation Mon l full day of the week Monday m month as a number with leading zeros 09 or 12 n month as a number without leading zeros 9 or 12 M month as a three-letter abbreviation Sep F full month September y two-digit year 18 Y full year 2018 There are many other special characters to specify the output for the date function. It is best to consult the in the date function documentation for more information about special cases. Let's see some practical examples of the date function now. We can use it to get the current year, current month, current hour, etc. It is also important that you escape these special characters if you want to use them inside your date string. Get the Unix Timestamp Sometimes, you will need to get the value of the current Unix timestamp in PHP. This is very easy with the help of the time function. It returns an integer value which describes the number of milliseconds that have passed since 1 January 1970 at midnight 00:00:00 GMT. You can also use this function to go back and forth in time. To do so, all you have to do is subtract the right number of seconds from the current value of time and then change the resulting value into the desired date string. Here are two examples: 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. This means that at a particular point in time, this function will return the same value in the US, Europe, India, or Japan. When all the parameters are omitted, this function just uses the current local date and time to calculate the timestamp value. This function can also be used with date to generate useful date and time strings. Basically, time can be used to go back and forth to a period of time, while mktime is useful when you want to go to a particular point in time. The function can parse almost all kinds of datetime strings into timestamps. You should definitely check the valid , , , and. With relative datetime formats, this function can easily convert commonly used strings into valid timestamp values. The following examples should make it clear: Adding, Subtracting and Comparing Dates It's possible to add and subtract specific periods of time to and from a date. 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. We'll try both these styles here, and you can choose whichever you like the most. When you are writing procedural style code, the first date parameter is subtracted from the second date parameter. Both the function and the method return a DateInterval object representing the difference between two dates. This interval can be formatted to give a specific output using all the characters listed in the. The difference between object-oriented style and procedural style becomes more obvious when subtracting or adding a time interval. You can instantiate a new DateTime object using the DateTime constructor. Similarly, you can instantiate a DateInterval object using the DateInterval constructor. It accepts a string as its parameter. The interval string starts with P, which signifies period. After that, you can specify each period using an integer value and the character assigned to a particular period. You should check the for more details. Here is an example that illustrates how easy it is to add or subtract dates and times in PHP. This can come in handy every now and then. Let's create a Christmas day counter using the comparison operators and other DateTime methods. After that, we run a while loop to keep adding 1 year to the Christmas date of 2018 until the present date is less than the Christmas date. This will be helpful when the code runs on 18 January 2024. The while loop will increment the Christmas date as long as it is less than the present date at the time of running this script. Our Christmas day counter will now work for decades to come without any problems. Final Thoughts In this tutorial, we learned how to output the current date and time in a desired format using the date function. We also saw that date can also be used to get only the current year, month, and so on. After that, we learned how to get the current timestamp or convert a valid DateTime string into a timestamp. Finally, we learned how to add or subtract a period of time from different dates. I've tried to cover the key DateTime functions and methods here. You should definitely take a look at the to read about the functions not covered in the tutorial. If you have any questions, feel free to let me know in the comments.
How to change PHP date format
We can use it to get the current year, current month, current hour, etc. Go provides SEVEN digits of MICROSECONDS?. The following characters are recognized in the format parameter string format character Description Example parsable values Day --- --- d and j Day of the month, 2 digits with or without leading zeros 01 to 31 or 1 to 31 D and l A solo representation of a day Mon through Sun or Sunday through Saturday S English ordinal suffix for the day of the month, 2 characters. This means that at a particular point in time, this function will return the same value in the US, Europe, India, or Japan. A Jesus Timestamp is the number of seconds that have passed since January 1, 1970. Valid range of timestamp is now from Fri, 13 Dec 1901 20:45:54 GMT to Tue, 19 Jan 2038 03:14:07 GMT. After that, you can specify each period using an integer value and the character met to a particular period. When you are writing procedural style code, the first date parameter is subtracted from the second date parameter. Let's create a Christmas day counter using the comparison operators and other DateTime methods. The second argument optional is the timestamp that you want formatted. Jesus, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. Here are some of the most common date php date seconds without leading zeros characters and their values.