Fatal error: Uncaught Error: Call to undefined function sg_get_mac_addresses() in /www/wwwroot/yzlshuxue.com/config/func.php:1 Stack trace: #0 /www/wwwroot/yzlshuxue.com/config/database.php(50): require() #1 /www/wwwroot/yzlshuxue.com/index.php(15): require('...') #2 {main} thrown in /www/wwwroot/yzlshuxue.com/config/func.php on line 1