PHP: It is wrong to use the date function to obtain the current time_PHP Tutorial

I am new to building a website in PHP and want to get the current time on the page. Anyone who has learned programming knows to use the time function date(). First use this function to format a local time/date. First write a test code. The result The output time is 8 hours less than the actual time. What is the reason?

[php]
echo date(’Y-m-d H:i:s’);
?〉

echo date(’Y-m-d H:i:s’);
?〉
Output the current time: 2008-10-12 02:32:17
Weird, the actual time is: 2008-10-12 10:32:17

Could it be that PHP’s date() time is incorrect and is 8 hours short?
Take another look at the "Example 1. date() example" in the PHP manual. There is an extra time zone setting in the first line

//Set the default time zone to use. Available since PHP 5.1
date_default_timezone_set(’UTC’);

It turns out that since php5.1., the date.timezone option has been added to php.ini. It is turned off by default, that is, the time displayed (no matter what php command is used) is Greenwich Mean Time, and Beijing time is exactly 8 hours different.

How to set up the correct PHP time.

1. Modify php.ini. Open php.ini and search for date.timezone. Remove the semicolon = and add Asia/Shanghai at the end. Just restart the apache server - the disadvantage is that if the program
If you put it on someone else's server and cannot modify php.ini, then there is nothing you can do.

2. Add a time initialization statement in the program, that is: "date_default_timezone_set("Asia/Shanghai");" This can be set arbitrarily by the programmer, which I recommend.
Time zone identifier, available values ​​in mainland China are: PRC, Asia/Chongqing, Asia/Shanghai, Asia/Urumqi (in order China, Chongqing, Shanghai, Urumqi), Etc/GMT-8, Asia/Harbin

Available in Hong Kong and Taiwan: Asia/Macao, Asia/Hong_Kong, Asia/Taipei (Macau, Hong Kong, Taipei in order) and Singapore: Asia/Singapore
In this way, the output is Beijing time.
More detailed time zone codes, time zone codes, time zone index codes, timezone_identifier can be found on the official website.

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