How to convert php time to cst format

As a popular programming language, PHP provides many powerful functions and class libraries that can easily convert and format time. In this article, we will discuss how to convert time format to CST (China Standard Time) in PHP.

1. Understand the CST format

First of all, we need to understand what the CST time format is. CST is the abbreviation of China Standard Time, which is 8 hours earlier than international standard time. That is to say, when international standard time is 12 pm, China time should be 8 pm.

The full format of CST is "Y year m month d day H:i:s", where "Y" represents the year, such as "2020"; "m" represents the month, such as "05"; "d " represents the date, such as "08"; "H" represents the number of hours, in 24-hour format, such as "19"; "i" represents the number of minutes, such as "30"; "s" represents the number of seconds, such as "50".

2. Convert PHP time to CST format

Converting time to CST format using PHP is very simple, you just need to pass the timestamp or date string to date( ) function, and set the format string to "Y year m month d day H:i:s", as shown below:

$date = "2020-05-08 19:30:50";
$cst_date = date('Y年m月d日 H:i:s', strtotime($date) + 8 * 3600);
echo $cst_date;

In the above example, we first defined a date string " 2020-05-08 19:30:50" and then use the strtotime() function to convert it to a timestamp. Next, we add an 8-hour offset to the timestamp to convert it to CST time. Finally, we use the date() function to format the time into the format of "Y year m month d day H:i:s" and print it out.

This will output: "2020-05-08 19:30:50", which is the CST time in the ISO 8601 standard format.

3. Convert time using DateTime class

Another way to convert PHP time to CST format is to use PHP’s DateTime class. This class provides more methods to handle date and time, including creating date and time objects, comparing date and time, formatting date and time, etc.

The following is an example of converting PHP time to CST format using the DateTime class:

$date = "2020-05-08 19:30:50";
$cst_date = new DateTime($date, new DateTimeZone('UTC'));
$cst_date->modify('+8 hours');
echo $cst_date->format('Y年m月d日 H:i:s');

In the above example, we first created a datetime object using the DateTime class, setting it to UTC time and then convert it to CST time. Next, we use the modify() method to add 8 hours to the CST time. Finally, we use the format() method to format the date and time object into the format of "Y year m month d day H:i:s" and print it out.

This will output: "2020-05-08 19:30:50", which is the CST time in the ISO 8601 standard format.

4. Summary

In this article, we introduced how to convert PHP time to CST format. Whether you use the date() function or the DateTime class, you can easily convert PHP time to CST time and format it to suit your needs.

It should be noted that CST time is offset by 8 hours relative to UTC time, so you need to convert UTC time to CST time to get the correct result.

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