How to convert total seconds into hours, minutes and seconds in php

When developing back-end applications, we often need to convert a total number of seconds into hour, minute, and second format to better display time information. In PHP language, we can use some simple code to achieve this function. This article will introduce you how to convert total seconds in PHP to hours, minutes and seconds format.

1. How to obtain the total number of seconds

In PHP, we can obtain the current UNIX timestamp through the time() function. A UNIX timestamp refers to the number of seconds that have elapsed since 0:00:00 on January 1, 1970. We can also use the strtotime() function to convert a standard time string to a UNIX timestamp.

For example, the following code will get the current UNIX timestamp and print it out:

$timestamp = time();
echo $timestamp;

The output result is:

1623761913

2. Convert the total seconds to Hours, minutes and seconds format

In PHP, we can use mathematical operations and string operations to convert the total seconds into hours, minutes and seconds format. The specific implementation method is as follows:

function secondsToTime($seconds) {
  $hours = floor($seconds / 3600);
  $minutes = floor(($seconds - ($hours * 3600)) / 60);
  $seconds = $seconds - ($hours * 3600) - ($minutes * 60);
  return str_pad($hours, 2, '0', STR_PAD_LEFT).':'.str_pad($minutes, 2, '0', STR_PAD_LEFT).':'.str_pad($seconds, 2, '0', STR_PAD_LEFT);
}

In the above code, we define a function named secondsToTime(), which is used to convert the total number of seconds into hour, minute, and second format. The parameter $seconds of this function represents the total number of seconds entered.

First, we divide the total number of seconds by 3600 to get the number of hours. The floor() function in PHP can round a floating point number down and return an integer. For example, the result of floor(5.5) is 5.

We then subtract the number of seconds represented by the hour from the total seconds to get the remaining seconds. Divide the remaining seconds by 60 to get the minutes. Likewise, we round down using the floor() function.

Finally, we subtract the number of seconds represented by minutes from the remaining seconds to get the final number of seconds.

Finally, we use the str_pad() function to fill the hours, minutes and seconds into two digits and concatenate them into a string, expressed in hours, minutes and seconds format.

Since different total seconds may be converted into different hours, minutes and seconds, we need to use the str_pad() function to fill in to ensure a uniform format of the output results.

3. Apply the code to an actual scenario

Now, we try to apply the above code to an actual scenario. Suppose we want to convert the total playing time of a video (in seconds) into hours, minutes and seconds format for easy display to users.

The following is a simple example:

$videoLength = 8939; // 视频总播放时长为8939秒
$playTime = secondsToTime($videoLength);
echo $playTime; // 输出结果为：02:28:59

In the above code, we set the total video playback time to 8939 seconds, and call the secondsToTime() function to convert it to hour, minute, and second format. Finally, we print out the converted hours, minutes and seconds format and display it to the user.

4. Summary

Through the above introduction, we have learned how to convert PHP total seconds into hour, minute, and second format. This type of time conversion is very common and useful in back-end applications. Using this approach, we can easily convert the total seconds into an easy-to-read format and display it to the user. I hope you can apply this knowledge in actual work and add more practical functions to your applications.

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