How to convert PHP timestamp to configuration

With the continuous development of Internet technology, more and more website applications use the PHP programming language. Although the PHP language is easy to learn and use, there are some time-related problems, such as the mutual conversion of timestamps and time. This is an issue that requires special attention from developers. This article will introduce the method of PHP timestamp conversion configuration, allowing you to easily deal with time-related development issues.

1. Understanding PHP timestamp

Time stamp is a very common time representation method in computers. It refers to the time from January 1, 1970, 0:00:00 (UTC ) the total number of seconds until now. In PHP, you can use the time() function to get the current timestamp, for example:

$current_timestamp = time();

To format the timestamp, you need to use the date() function, for example:

$current_time = date('Y-m-d H:i:s', time());

above The code formats the current timestamp into the format year-month-day hour:minute:second.

2. Convert PHP timestamp to other time formats

In PHP, you can convert a timestamp into other forms of time representation through many functions, such as:

1. Convert the timestamp to the form of year, month and day (Y-m-d):

$date = date('Y-m-d', $timestamp);

2. Convert the timestamp to the form with the day of the week:

$date = date('l, F jS Y', $timestamp);

Where, l represents the day of the week , F represents the month, jS represents the day, and Y represents the year.

3. Convert the timestamp to a human-readable relative time:

function relative_time($timestamp) {
    $diff = time() - $timestamp;
    if ($diff < 60) {
        return $diff . &#39;秒前&#39;;
    } else if ($diff < 3600) {
        return round($diff/60) . &#39;分钟前&#39;;
    } else if ($diff < 86400) {
        return round($diff/3600) . &#39;小时前&#39;;
    } else {
        return round($diff/86400) . &#39;天前&#39;;
    }
}

The above code converts the timestamp into a relative time representation to the current time.

3. Use of PHP time configuration file

PHP provides a special function - strtotime(), which can convert a time in the form of a string into a timestamp. For example:

$timestamp = strtotime('2019-10-01 10:00:00');

The above code converts the string "2019-10-01 10:00:00" into the corresponding timestamp.

However, sometimes we need to write a PHP program for long-term use, and some time parameters in it may be difficult to modify. In this case, the PHP time configuration file can be used.

PHP time configuration file can be used to store some specific time or time range values, making the code more readable and maintainable. For example, we can create a config.php file containing the following content:

<?php 
define(&#39;START_TIME&#39;, strtotime(&#39;2019-01-01 00:00:00&#39;));
define(&#39;END_TIME&#39;, strtotime(&#39;2020-01-01 00:00:00&#39;));
define(&#39;OFFLINE_TIME&#39;, strtotime(&#39;2020-01-01 00:00:00&#39;));
?>

Then reference this file in the program:

require_once('config.php');

In this way, we can directly use the definitions of START_TIME, END_TIME, and OFFLINE_TIME Good constant.

4. Summary

This article mainly introduces the method of PHP timestamp conversion configuration, including converting timestamps to time representation in other formats and using PHP time configuration files. For developers, it is crucial to deal with time-related issues reasonably and correctly. I hope that the introduction of this article will enable readers to better understand how to deal with time-related issues.

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