Warning: require_once(./conexion/config_1.php): failed to open stream: No such file or directory in C:\xampp\htdocs\costo_1\php\tabla_art.php on line 3

Fatal error: require_once(): Failed opening required './conexion/config_1.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\costo_1\php\tabla_art.php on line 3