Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in /var/www/html/database/Mysql.php:30 Stack trace: #0 /var/www/html/database/Mysql.php(20): Mysql->connect() #1 /var/www/html/database/Mysql.php(25): Mysql->__construct('127.0.0.1', 'db3', 'gminapuckNewPas...', 'db3') #2 /var/www/html/database/publicdb.php(50): Mysql::getInstance() #3 {main} thrown in /var/www/html/database/Mysql.php on line 30