How to convert timestamp to seconds in php

In PHP programming, timestamp is a commonly used concept. A timestamp is a way to represent time. Generally speaking, it is a long integer that represents the number of seconds that have passed since Greenwich Mean Time (midnight on January 1, 1970) to the current time. The timestamp can be obtained through the keyword time() function, or generated from other date variables.

In some cases, we need to convert the timestamp into a specific time. In this article, we will explain how to convert timestamps into seconds.

First, let's take a look at how to get the current timestamp. In PHP language, we can use the time() function to get the current timestamp. The following is a sample code to get the current timestamp:

$timestamp = time();
echo $timestamp;

The above code will output the current timestamp, for example: 1628193122.

Once we obtain the timestamp, we can use the date() function in PHP to convert the timestamp into a specific date format. The following is a sample code to convert a timestamp into a date format:

$timestamp = 1628193122;
$date = date('Y-m-d H:i:s', $timestamp);
echo $date;

The above code will output a date in the following format: 2021-08-05 14:58:42.

If we want to convert the timestamp into seconds, we can use the following code:

$timestamp = 1628193122;
$seconds = date('s', $timestamp);
echo $seconds;

The above code will output the corresponding number of seconds in the timestamp, for example: 42.

In addition, we can also use the gmdate() function in PHP to convert the timestamp into a specific date format. The gmdate() function is similar to the date() function, but it uses Greenwich Mean Time to avoid time zone issues. The following is a sample code that uses the gmdate() function to convert a timestamp into seconds:

$timestamp = 1628193122;
$seconds = gmdate('s', $timestamp);
echo $seconds;

The above code will output the corresponding number of seconds in the timestamp, for example: 42.

To sum up, timestamp in PHP is a very important concept. When writing PHP code, we can use timestamps to implement many time-related functions. Timestamps can be easily converted to specific date and time formats using the date() function and gmdate() function. In addition, by simply modifying the parameters of the date() function, the timestamp can be converted into different time formats such as minutes, hours, days, months, etc. These tips can help PHP programmers deal with time-related issues more easily.

The above is the detailed content of How to convert timestamp to seconds in php. For more information, please follow other related articles on the PHP Chinese website!