Fatal error: Uncaught TypeError: fwrite(): Argument #1 ($stream) must be of type resource, false given in E:\Web4\server_func1.php:510 Stack trace: #0 E:\Web4\server_func1.php(510): fwrite() #1 E:\Web4\server_func1.php(4510): debug_mail() #2 E:\Web4\server_func1.php(9): transfer_szinkron() #3 E:\Web4\index.php(8): include_once('...') #4 {main} thrown in E:\Web4\server_func1.php on line 510