Fatal error: Uncaught TypeError: set_exception_handler(): Argument #1 ($callback) must be a valid callback or null, non-static method DmNException::handleException() cannot be called statically in C:\xampp\htdocs\index.php:30 Stack trace: #0 C:\xampp\htdocs\index.php(30): set_exception_handler(Array) #1 {main} thrown in C:\xampp\htdocs\index.php on line 30