It is not safe to rely on the system's timezone settings

Writing PHPProgramSometimes the following warning occurs:
PHP warning: Date (): it is not safe to rely on the system's timezone settings. you are * required * to use the date. timezone setting or the date_default_timezone_set () function. in case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. we selected 'utc' for '8. 0/No DST 'Instead in D: \ phpweb \ news \ file. PHP on line 17. This is because the time taken by PHP is Greenwich mean time, so there will be a difference between the GMT Standard Time and the Beijing time by about eight hours. We can solve this problem as follows:
1. Use date_default_timezone_set () in the page header to set my default time zone to Beijing time, that is, <? PHP date_default_timezone_set ("PRC");?> You can.
2. in PHP. ini, set the value of date. timezone to PRC, set date. timezone to PRC, and cancel this line. CodeTo remove the semicolon.