Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /opt/lampp/htdocs/zwechat/class/db.php:2 Stack trace: #0 /opt/lampp/htdocs/zwechat/class/sql.php(1): include_once() #1 /opt/lampp/htdocs/zwechat/vote/vote_deal.php(2): include('/opt/lampp/htdo...') #2 {main} thrown in /opt/lampp/htdocs/zwechat/class/db.php on line 2