A brief analysis of the method of converting php timestamp to js timestamp

In front-end and back-end interactions, timestamp is a very common data format. A timestamp in PHP represents the number of seconds since January 1, 1970, 0:00:00, while a timestamp in JavaScript represents the number of milliseconds since January 1, 1970, 0:00:00. During the front-end and back-end interaction process, sometimes it is necessary to convert the timestamp in PHP into a timestamp in JavaScript. At this time, we need to use some functions to achieve this.

1. Convert timestamp to time format in PHP

Use the date() function in PHP to format the timestamp into time format. The code is as follows:

// $timestamp是从数据库获取的时间戳
$date = date('Y-m-d H:i:s', $timestamp);

Here Format the timestamp into the format of "Year-Month-Day Hour:Minute:Second". If you need to format the time into another format, you can adjust the parameters of the date() function according to your needs.

2. Convert the time format into timestamp in PHP

Use strtotime() function in PHP to convert the time format into timestamp. The code is as follows:

// $date是从前端页面获取的时间，例如2021-09-01 12:00:00
$timestamp = strtotime($date);

Place $ After the date is converted into a timestamp, subsequent calculations and processing can be performed.

3. Convert PHP timestamp to JavaScript timestamp

Use the time() function in PHP to get the current timestamp. The code is as follows:

$timestamp = time();

Convert the timestamp in PHP When converting timestamps to timestamps in JavaScript, you need to multiply the number of seconds in PHP by 1000 to get the number of milliseconds in JavaScript. The code is as follows:

$js_timestamp = $timestamp * 1000;

4. Convert JavaScript timestamps to time format

Use the Date object in JavaScript to convert the timestamp into time format. The code is as follows:

// $js_timestamp是从后台获取的JavaScript时间戳
var date = new Date($js_timestamp);
var year = date.getFullYear();
var month = date.getMonth() + 1;
var day = date.getDate();
var hour = date.getHours();
var minute = date.getMinutes();
var second = date.getSeconds();
var time = year + "-" + month + "-" + day + " " + hour + ":" + minute + ":" + second;

Here, the timestamp conversion format in JavaScript is "Year-Month-Day Hour:Minute:Second" format. Likewise, if you need to format the time into a different format, you can adjust the code to suit your needs.

5. Convert JavaScript time format to timestamp

Use Date object in JavaScript to convert the time format to timestamp. The code is as follows:

var date = new Date("2021-09-01 12:00:00");
var js_timestamp = date.getTime();

Here "2021- 09-01 12:00:00" is converted to a timestamp in JavaScript.

In actual development, it is necessary to select the appropriate time format and timestamp for data interaction and processing according to specific needs. Through the above functions and methods, conversion between PHP timestamps and JavaScript timestamps can be easily achieved.

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