How to convert timestamp to JavaScript timestamp with PHP

JavaScript and PHP are both commonly used web development languages, and timestamp conversion is often required in the two environments. Timestamps in JavaScript are measured in milliseconds, while timestamps in PHP are measured in seconds. Therefore, when we need to convert timestamps between two languages, some simple calculations and adjustments are required. This article will demonstrate how to convert a timestamp to a PHP timestamp using JavaScript, and how to convert a timestamp to a JavaScript timestamp using PHP.

Convert JavaScript timestamp to PHP timestamp

In JavaScript, the way to get the current timestamp is through the Date.now() function, which returns since 1970 The number of milliseconds elapsed since January 1, year. In PHP, the way to get the current timestamp is through the time() function, which returns the number of seconds that have passed since January 1, 1970. Therefore, when converting a JavaScript timestamp to a PHP timestamp, you need to divide the JavaScript timestamp by 1000 to get the timestamp in seconds. The specific code is as follows:

// JavaScript代码
var jsTimestamp = Date.now();
var phpTimestamp = Math.round(jsTimestamp / 1000);

// PHP代码
$jsTimestamp = 1572669260000;
$phpTimestamp = floor($jsTimestamp / 1000);

In the above code, we first get the JavaScript timestamp of the current time, and then use the Math.round() function to divide it by 1000 and round it, and get PHP timestamp. In PHP, you can also use the floor() function to round down to get the PHP timestamp.

Convert PHP timestamp to JavaScript timestamp

In PHP, the way to get the current timestamp is through the time() function, which returns the date since 1970 1 The number of seconds elapsed since the 1st of the month. However, in JavaScript, the way to get the current timestamp is through the Date.now() function, which returns the number of milliseconds that have elapsed since January 1, 1970. So when converting a PHP timestamp to a JavaScript timestamp, you need to multiply the PHP timestamp by 1000 to get the timestamp in milliseconds. The specific code is as follows:

// PHP代码
$phpTimestamp = time();
$jsTimestamp = $phpTimestamp * 1000;

// JavaScript代码
var phpTimestamp = 1572669302;
var jsTimestamp = phpTimestamp * 1000;

In the above code, we first get the PHP timestamp of the current time, and then multiply it by 1000 to get the JavaScript timestamp. You can also use the Date.parse() function in JavaScript to convert a time string into a JavaScript timestamp, for example:

var phpTimeString = '2019-11-01 12:00:00';
var phpTimestamp = Date.parse(phpTimeString) / 1000;

In the above code, we convert the PHP time string into JavaScript timestamp and divide it by 1000 to get the timestamp in seconds.

Summary

This article explains how to convert timestamps between JavaScript and PHP. When converting a JavaScript timestamp to a PHP timestamp, divide the JavaScript timestamp by 1000 and round or round down to get a timestamp in seconds. When converting a PHP timestamp to a JavaScript timestamp, multiply the PHP timestamp by 1000 to get the timestamp in milliseconds. Through the above method, we can easily convert timestamps between the two languages ​​to better complete web development tasks.

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