Connection failed : SQLSTATE[HY000] [1049] Unknown database 'data_disordine'

Fatal error: Uncaught Error: Call to a member function prepare() on null in /var/www/html/admin/query/catalog_id.php:17 Stack trace: #0 /var/www/html/catalog.php(62): catalog_id() #1 {main} thrown in /var/www/html/admin/query/catalog_id.php on line 17