How to convert timestamp to time format in php

When developing websites and applications, it is often necessary to convert timestamps into date and time formats that are easy to understand and use. In PHP, you can use simple code to convert timestamps into time. Below we will introduce the specific implementation method.

1. What is a timestamp?

Time stamp refers to a data format that represents time. It is the number of seconds that have elapsed since January 1, 1970 00:00:00 Greenwich Mean Time, also known as UNIX timestamp or UNIX time. Timestamps are usually represented by 10 or 13 digits, where 10 digits represent the number of seconds elapsed since January 1, 1970 00:00:00, while 13 digits represent the elapsed time since January 1, 1970 00 The number of milliseconds since :00:00.

2. Convert timestamp to time format

In PHP, you can convert a timestamp into an easy-to-understand date by passing it to some built-in functions and time format. Below we introduce two commonly used functions for converting timestamps.

1. Use the date() function

The date() function is a commonly used date and time function in PHP. It can convert timestamps into readable date and time formats. Its basic syntax is as follows:

date( string $format [, int $timestamp = time() ] ) : string

Among them, the parameter $format is the date and time format string, and the parameter $timestamp is the timestamp value that needs to be converted. The default value is the timestamp of the current time.

For example:

$timestamp = 1630458240;
$time = date("Y-m-d H:i:s", $timestamp);
echo $time;

Executing the above code will output 2021-09-01 23:50:40, which converts the timestamp into year-month -The format of day, hour:minute:second.

2. Use the gmdate() function

Similar to the date() function, the gmdate() function can also convert timestamps into easy-to-understand date and time formats, but the difference is that It will output the time in Greenwich Mean Time. The basic syntax of the gmdate() function is as follows:

gmdate( string $format [, int $timestamp = time() ] ) : string

Among them, the parameter $format is the date and time format string, and the parameter $timestamp is the timestamp value that needs to be converted. The default value is the timestamp of the current time.

For example:

$timestamp = 1630458240;
$time = gmdate("Y-m-d H:i:s", $timestamp);
echo $time;

Executing the above code will output 2021-09-01 15:50:40, which converts the timestamp into year-month -The format of day, hour:minute:second is based on Greenwich Mean Time.

3. Summary

In PHP, use the date() function and gmdate() function to convert the timestamp into an easy-to-understand date and time format, which is convenient We process and display time on our website and apps. At the same time, we can also customize the date and time format string to achieve a more personalized time display effect.

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