Php: PHP time zone settings

Question: PHP time zone settings date_default_timezone_set (Etc/GMT-8) why does it represent the GMT zone answer: www.2cto. comdate_default_timezone_set (& quot; Etc/GMT & quot;); is the Greenwich mean time, and the resulting time is the same as the default time zone ate_de question: PHP time zone setting date_default_timezone_set (Etc/GMT-8) why does it mean answer: www.2cto.com date_default_timezone_set ("Etc/GMT") in GMT? the obtained time is the same as the default time zone ate_default_timezone_set ("Etc/GMT + 8 "); 8 hours slower than the standard time of Linwei governance, date_default_timezone_set ("Etc/GMT-8"); UTC + 8, we get 8 hours earlier than that, so reduce 8 or use: date_default_timezone_set ('prc '); set China time zone