Warning: include_once(db.php): failed to open stream: No such file or directory in C:\xampp\htdocs\info.php on line 3

Warning: include_once(): Failed opening 'db.php' for inclusion (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\info.php on line 3

Notice: Undefined variable: conn in C:\xampp\htdocs\app\design\fronted\info\default\template\page\controler\select_details.php on line 5

Fatal error: Uncaught Error: Call to a member function query() on null in C:\xampp\htdocs\app\design\fronted\info\default\template\page\controler\select_details.php:5 Stack trace: #0 C:\xampp\htdocs\info.php(6): include() #1 {main} thrown in C:\xampp\htdocs\app\design\fronted\info\default\template\page\controler\select_details.php on line 5