Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /var/www/vhosts/kpk-school.ac.th/httpdocs/kpk2019/includes/class.mysql.php:26 Stack trace: #0 /var/www/vhosts/kpk-school.ac.th/httpdocs/kpk2019/mainfile.php(18): DB->__construct() #1 /var/www/vhosts/kpk-school.ac.th/httpdocs/kpk2019/index.php(42): require_once('/var/www/vhosts...') #2 {main} thrown in /var/www/vhosts/kpk-school.ac.th/httpdocs/kpk2019/includes/class.mysql.php on line 26