How to convert 13-digit timestamp in PHP

In PHP, timestamp is a very common concept. A timestamp can be used to record the specific time when an event occurs. It usually consists of the year, month, and day representing the date, and the hour, minute, second, millisecond, etc. representing the time. In PHP, we can use timestamps to operate and calculate time. However, under the POSIX standard, the timestamp length is only 10 digits. If you need to save millisecond-level times, you need to use a 13-bit timestamp. So, if you need to convert a 13-digit timestamp in PHP, how to do it?

First, we need to figure out the format of the 13-digit timestamp. The 13-digit timestamp refers to the number of milliseconds that have elapsed from 00:00:00 UTC on January 1, 1970 to the present, so its length is 13. For example, the 13-digit timestamp of the current time can be obtained using the following code:

<?php
echo round(microtime(true) * 1000);
?>

Next, if you need to convert the 13-digit timestamp into date and time format, you can also use PHP's built-in functions for processing. We can use the date() function to format the 13-digit timestamp, for example:

<?php
$timestamp = 1570022405000; // 假设13位时间戳
$date_time = date(&#39;Y-m-d H:i:s&#39;, $timestamp/1000); // 转换为日期时间格式
echo $date_time;
?>

In the above code, we divide the 13-digit timestamp by 1000 to get a 10-digit timestamp. Add this The 10-digit timestamp is passed in as the second parameter of the date() function, which can be converted into the required date and time format.

However, if you need to convert the date and time format into a 13-digit timestamp, you can also use PHP's built-in functions for processing. We can use the strtotime() function to convert the date and time format into a 10-digit timestamp, and then multiply it by 1000 to get a 13-digit timestamp, for example:

<?php
$date_time = &#39;2019-10-02 12:00:05&#39;; // 假设日期时间格式
$timestamp = strtotime($date_time) * 1000; // 转换为13位时间戳
echo $timestamp;
?>

In the above code, we use the date and time format as strtotime( ) function is passed in, converted to a 10-digit timestamp, and then multiplied by 1000 to obtain a 13-digit timestamp.

To sum up, we can use PHP's built-in functions to convert 13-digit timestamps and date and time formats to each other accurately and easily. This provides a lot of convenience for us to deal with time-related issues in PHP.

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