What should I do if the time displayed in php is different from the actual time?

Solution: 1. Use "ini_set('date.timezone','PRC')" to set the time zone; 2. Use "date_default_timezone_set('PRC')" to set the time zone; 3. In the configuration file, Set "date.timezone=PRC".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In PHP, the displayed time is inconsistent with the actual time , because the time zone setting is wrong.

The world is divided into 24 time zones. Each time zone has its own local time. The local time of each time zone differs from 1 to 23 hours at the same time. For example, the local time in London, UK, and the local time in Beijing differ by 8 hours. .

If you want to set the displayed time to be the same as the actual time, you need to set the time zone to the local time zone. Here are some common time zone identifiers and their meanings:

• Asia /Shanghai —— Shanghai

• Asia/Chongqing —— Chongqing

• Asia/Urumqi —— Urumqi

• Asia/Hong_Kong —— Hong Kong

• Asia/Macao —— Macao

• Asia/Taipei —— Taipei

• Asia/Singapore - Singapore

• PRC - China Time Zone

Note: If we are in China, we will change the time zone It can be set to "Asia/Shanghai or PRC". Remember to restart the server after the setting is successful!

Let’s take a look at how to set the time zone:

Method 1: Use the ini_set() function to set the time zone

In PHP The ini_set() function can set the value of a specified configuration option. This configuration option will maintain the new value while the script is running, and restore it when the script ends. The syntax format of the function is as follows:

ini_set($varname, $newvalue)

where $varname is the configuration option to be modified, and $newvalue is the new value of the configuration option.

Example:

<?php
header("Content-type:text/html;charset=utf-8"); 
ini_set(&#39;date.timezone&#39;, &#39;GMT&#39;);
echo &#39;当前的格林尼治时间为：&#39;.date(&#39;Y-m-d H:i:s&#39;,time()).&#39;<br>&#39;;
ini_set(&#39;date.timezone&#39;, &#39;PRC&#39;);
echo &#39;国内当前时间为：&#39;.date(&#39;Y-m-d H:i:s&#39;,time());
?>

Output result:

##Method 2: Use date_default_timezone_set() function Set time zone

date_default_timezone_set($timezone_identifier)

<?php
header("Content-type:text/html;charset=utf-8"); 
date_default_timezone_set(&#39;Europe/Lisbon&#39;);
echo &#39;葡萄牙的当前时间为：&#39;.date(&#39;Y-m-d H:i:s&#39;,time()).&#39;<br>&#39;;
date_default_timezone_set(&#39;PRC&#39;);
echo &#39;国内当前时间为：&#39;.date(&#39;Y-m-d H:i:s&#39;,time());
?>

in the configuration file php.ini The configuration file of PHP is the php.ini file in the PHP installation directory. Find and open it. Then search for date.timezone in the file, we will see a piece of information as shown below:

[Date]
; Defines the default timezone used by the date functions
; http://php.net/date.timezone
;date.timezone =

where

the ; in front of it is the same as PHP The // has the same function and means a comment. Here we need to remove this; and fill in the corresponding time zone identifier after = in this sentence, as shown below :

[Date]
; Defines the default timezone used by the date functions
; http://php.net/date.timezone
date.timezone = PRC