A brief analysis of how to convert timestamps between JavaScript and PHP

With the continuous development of modern Internet technology, JavaScript and PHP have become one of the most popular programming languages. In the development process of web applications, the use of timestamps is very common. It is usually used to record the time and date of events, and to handle related time calculations. Both JavaScript and PHP have their own timestamp representation methods. If you need to convert timestamps between the two languages, some additional processing is required. In this article, we will introduce how to convert timestamps between JavaScript and PHP.

Timestamp format for JavaScript and PHP

In JavaScript, a timestamp refers to a time starting from 00:00:00 UTC (Coordinated Universal Time) on January 1, 1970 of milliseconds. The way to get the current timestamp in JavaScript is through the getTime() method of the Date object, as shown below:

var timestamp = new Date().getTime(); //获取当前时间戳

In PHP, the timestamp refers to the time since January 1, 1970 00:00:00 UTC (Coordinated Universal Time) The number of seconds from the start of a time. The way to get the current timestamp in PHP is through the time() function, as shown below:

$timestamp = time(); //获取当前时间戳

Convert JavaScript timestamp to PHP timestamp

The main principle of converting JavaScript timestamp to PHP timestamp is The number of seconds required to convert a JavaScript timestamp to a PHP timestamp, then add the number of seconds elapsed from January 1, 1970 00:00:00 UTC to January 1, 1900 00:00:00 UTC ( That is 2208988800 seconds), and the final result is the PHP timestamp. The specific implementation method is as follows:

function jsTimestampToPhpTimestamp(jsTimestamp) {
  var phpTimestamp = Math.floor(jsTimestamp / 1000) + 2208988800;
  return phpTimestamp;
}

In the above code, we divide the JavaScript timestamp by 1000 to get the required number of seconds, and then add 2208988800 to finally get the PHP timestamp.

PHP timestamp to JavaScript timestamp

The main principle of converting PHP timestamp to JavaScript timestamp is to multiply the PHP timestamp by 1000 to get the required number of milliseconds. The final result is JavaScript timestamp. The specific implementation method is as follows:

function phpTimestampToJsTimestamp(phpTimestamp) {
  var jsTimestamp = phpTimestamp * 1000;
  return jsTimestamp;
}

In the above code, we multiply the PHP timestamp by 1000 to get the required number of milliseconds, and finally get the JavaScript timestamp.

Summary

The above is the method of timestamp conversion between JavaScript and PHP. When we need to convert timestamps between the two languages, we can process it according to the above method. It should be noted that when performing timestamp conversion, the impact of time zone needs to be considered, otherwise timestamp conversion errors may occur. At the same time, in the actual application process, we can also use third-party libraries to convert time formats, such as the Moment.js library.

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