Warning: include(config.php): Failed to open stream: No such file or directory in D:\xampp\htdocs\add_app.php on line 2

Warning: include(): Failed opening 'config.php' for inclusion (include_path='D:\xampp\php\PEAR') in D:\xampp\htdocs\add_app.php on line 2

Warning: Undefined variable $conexion in D:\xampp\htdocs\add_app.php on line 29

Fatal error: Uncaught Error: Call to a member function query() on null in D:\xampp\htdocs\add_app.php:29 Stack trace: #0 {main} thrown in D:\xampp\htdocs\add_app.php on line 29