How to convert timestamp to date in php

PHP A timestamp is a way of representing a time date, which is an integer representing the number of seconds that have elapsed since the Unix Epoch (January 1, 1970 00:00:00 UTC).

When developing web applications, we often use timestamps to record events and handle various time-related operations. However, converting timestamps to dates is a common need because dates are easier to read and understand. In this article, we will discuss how to convert PHP timestamp to date.

PHP provides two functions that can be used to process timestamps and dates. These functions are date() and strtotime() respectively.

Convert timestamp to date

Converting timestamp to date is very simple using the date() function. Here is an example:

// 获取当前时间戳
$timestamp = time();
// 转换为日期格式
$date = date('Y-m-d H:i:s', $timestamp);
// 输出日期
echo $date;

In the above code, the time() function returns the timestamp of the current time, and then the date() function is used to convert the timestamp Convert to date format. The first parameter is a date format string, such as the Y-m-d H:i:s format used in the example above. The second parameter is the timestamp.

If you want to format the timestamp into a different date format, please refer to the following commonly used date format codes:

• Y: four-digit year , such as 2022;
• y: two-digit year, such as 22;
• m: month (01-12);
• d: Date (01-31);
• H: 24-hour hour (00-23);
• h: Number of hours in 12-hour format (01-12);
• i: Number of minutes (00-59);
• s: Seconds (00-59);
• a: Lowercase AM or PM mark;
• A: Uppercase AM or PM mark ;

Convert date to timestamp

Converting date to timestamp is also very simple. The following example demonstrates how to use the strtotime() function to convert a date to a timestamp:

// 定义日期和时间格式
$date_str = '2022-05-17 12:30:00';
// 将日期转换为时间戳
$timestamp = strtotime($date_str);
// 输出时间戳
echo $timestamp;

In the code above, the strtotime() function converts a date string to Unix timestamp. In this example, $date_str indicates the date and time format to be converted. Finally, store the new timestamp in the variable $timestamp.

Handling time zone

When dealing with time-related operations, time zone is an important part. PHP provides some time zone related functions to facilitate developers to deal with time zones. When dealing with date and time related operations, we can use the date_default_timezone_set() function to set the time zone.

The following is an example:

// 设置时区为北京时间
date_default_timezone_set('Asia/Shanghai');
// 获取当前时间戳
$timestamp = time();
// 转换为日期格式
$date = date('Y-m-d H:i:s', $timestamp);
// 输出日期和时间
echo $date;

In the above code, the date_default_timezone_set() function sets the time zone to Asia/Shanghai and then gets Current timestamp, convert it to Beijing time, and convert it to date format.

Summary

In this article, we took a deep dive into how to convert a PHP timestamp to a date. Date and time handling is a very important part of web development and is very common. It is useful to understand how to use the date() and strtotime() functions.

Hope this article can help you understand how to convert PHP timestamp to date and learn to use time zone functions.

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