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Warning: mysqli::set_charset(): Couldn't fetch mysqli in /var/www/sb.bimm.uz/classes/database.class.php on line 31

Fatal error: Uncaught Error: Call to undefined function mysql_connect_error() in /var/www/sb.bimm.uz/classes/database.class.php:35 Stack trace: #0 /var/www/sb.bimm.uz/classes/database.class.php(23): Database->__construct() #1 /var/www/sb.bimm.uz/index.php(46): Database::getInstance() #2 {main} thrown in /var/www/sb.bimm.uz/classes/database.class.php on line 35