Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in /home/pbhs1961edu/old.pbhs1961.edu.bd/public_html/gate/system/classes/Database.php:42 Stack trace: #0 /home/pbhs1961edu/old.pbhs1961.edu.bd/public_html/gate/system/classes/Database.php(15): Database::conn() #1 /home/pbhs1961edu/old.pbhs1961.edu.bd/public_html/gate/system/classes/Database.php(20): Database->__construct() #2 /home/pbhs1961edu/old.pbhs1961.edu.bd/public_html/gate/system/core/init.php(30): Database::getInstance() #3 /home/pbhs1961edu/old.pbhs1961.edu.bd/public_html/gate/app.php(6): require_once('/home/pbhs1961e...') #4 /home/pbhs1961edu/old.pbhs1961.edu.bd/public_html/index.php(14): require_once('/home/pbhs1961e...') #5 {main} thrown in /home/pbhs1961edu/old.pbhs1961.edu.bd/public_html/gate/system/classes/Database.php on line 42