Summary of php time zone setting method

function_exists(date_default_timezone_set); //Here he always returns 1. This function is to determine whether the characters inside are a defined function name
date_default_timezone_set("Etc/GMT") ;//This is Greenwich Mean Time, the time obtained is the same as the default time zone
date_default_timezone_set("Etc/GMT+8");//This is 8 hours slower than Greenwich Mean Time
date_default_timezone_set("Etc/ GMT-8");//This is 8 hours ahead of Ringwich Standard Time
date_default_timezone_set('PRC'); //Set the Chinese time zone
?>

Function ini_set() to set the time zone: You can add ini_set('date.timezone','Asia/Shanghai'); // 'Asia/Shanghai' is the Shanghai time zone at the beginning of the file

Manually modify php.ini settings Open php and find date.timezone = "PRC". If there is one, remove the semicolon in front of it. If not, add it manually!

Some additional information: After installing PHP5 you will find this problem

$atime=date("Y-m-d H:i:s");
echo $atime;
?>

Output: 2006-05-16 06:36:06 What time is it now?/Mine is 14:36

The reason is that if you do not set the local time zone of your server in the program or configuration file, the time taken by PHP is Greenwich Mean Time, so it will be different from your local time. The difference between Greenwich Mean Time and Beijing Time is about 8 hours. So how can we avoid time errors?

Solution: Use date_default_timezone_set() in the header to set my default time zone to Beijing time

date_default_timezone_set('PRC');
echo date('Y-m-d H:i:s');
?>

The time is the same as the current time of the server ! In addition, the usage of date_default_timezone_set is as follows: date_default_timezone_set (PHP 5 >= 5.1.0RC1) date_default_timezone_set -- Set the default time zone used for all datetime functions in a script illustrate bool date_default_timezone_set (string timezone_identifier) date_default_timezone_set() sets the default time zone used for all datetime functions. Note: Since PHP 5.1.0 (the date and time functions have been rewritten in this version), each call to the date and time function will generate an E_NOTICE level error message if the time zone is illegal. parameters timezone_identifier Time zone identifier, such as UTC or Europe/Lisbon return value This function always returns TRUE (even if the timezone_identifier parameter is illegal). Or modify the date.timezone value in php.ini date.timezone = PRC