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Q:

PHP gmmktime() function (with example)

Hello everyone,

I am currently working on a PHP project and I came across the gmmktime() function. I am a bit confused about how it works and would greatly appreciate if someone could help me out.

I have seen that the gmmktime() function is used to get the Unix timestamp for a specific date and time - that part I understand. But I am not quite sure about the parameters it expects and how to use it correctly.

If I understand correctly, gmmktime() takes in the arguments for hour, minute, second, month, day, and year. My question is, in what format should I provide these values? Should they be in 24-hour format or 12-hour format with AM/PM? Also, is it mandatory to provide values for all the parameters, or can I leave some of them blank?

I would really appreciate it if someone can provide me with a simple example code snippet demonstrating the usage of gmmktime(). It would be even better if you could explain how to retrieve the Unix timestamp for a specific date and time, let's say January 1, 2022, at 8:30 AM UTC.

Thank you so much for your help!

All Replies

stiedemann.rickie

Hey there,

I've also had some experience using the gmmktime() function in my PHP projects, so I can share my thoughts with you.

When it comes to gmmktime(), it's important to note that it expects the values in 24-hour format for the hour parameter, and numerical values for the rest of the parameters. So you'll need to provide the hour, minute, second, month, day, and year values as integers.

It's mandatory to specify values for all of these parameters, but you can set them to 0 if you want to use the default values. For example, if you only want to specify the year, you can pass 0 for the other parameters.

To demonstrate the usage and obtain the Unix timestamp for January 1, 2022, at 8:30 AM UTC, you can use the following code snippet:

php
$timestamp = gmmktime(8, 30, 0, 1, 1, 2022);
echo $timestamp;


By running this code, you should get the corresponding Unix timestamp as the output.

Keep in mind that gmmktime() function returns the timestamp in UTC, but you can easily convert it to a specific timezone using functions like date_default_timezone_set() to set the desired timezone before further processing the timestamp.

I hope this information proves helpful to you. Feel free to ask if you have any more questions or need any further assistance.

ferne48

Hey all,

I've encountered the gmmktime() function myself and thought I'd share my experience with you. It's quite handy for dealing with dates and timestamps in PHP.

When using gmmktime(), keep in mind that it expects the input values to be provided in integer format. So, for the hour parameter, you should use the 24-hour format. However, don't worry about the leading zeros; you can use both 8 or 08 for 8 AM, for instance.

Regarding the other parameters, you'll need to input numerical values. Make sure to specify values for all the parameters; otherwise, it won't work as expected. But don't fret, if you want to use default values for some parameters, you can simply pass 0 in those spots.

To demonstrate how gmmktime() can be used, let's say you want to retrieve the Unix timestamp for January 1, 2022, at 8:30 AM UTC. Here's a code snippet to help you with that:

php
$timestamp = gmmktime(8, 30, 0, 1, 1, 2022);
echo $timestamp;


Running this code will output the Unix timestamp corresponding to the specified date and time.

One thing to keep in mind is that gmmktime() returns the timestamp in UTC. If you want to work with timestamps in a different timezone, consider adjusting it using date_default_timezone_set() or similar functions.

I hope this sheds some light on the gmmktime() function for you. If you have further questions, feel free to ask. Happy coding!

timmothy.jacobs

Hey there,

I've used the gmmktime() function before, so I'll be glad to share my experience with you.

To answer your first question, you need to provide the values in 24-hour format. The function expects hour, minute, second, month, day, and year arguments in that order. You'll need to provide values for all the parameters for the function to work properly. However, you can pass 0 for any parameters you don't want to specify. This allows you to create timestamps with default values for certain parameters, like using the current day or year while specifying a specific time.

Here's an example code snippet to get the Unix timestamp for January 1, 2022, at 8:30 AM UTC:

php
$timestamp = gmmktime(8, 30, 0, 1, 1, 2022);
echo $timestamp;


When you run this code, it should output the Unix timestamp corresponding to that date and time.

One thing to keep in mind is that gmmktime() returns the UTC timestamp. If you want to work with timestamps in a specific timezone, you might need to adjust it accordingly using the date_default_timezone_set() function or a similar method.

I hope this helps! Feel free to ask if you have any more questions.

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