Доступ отказался MySQL XAMPP Server
$cfg['Servers'][$i]['host'] = 'localhost';
and change it to
$cfg['Servers'][$i]['host'] = 'localhost:3307';
Xenophobic Xenomorph
$cfg['Servers'][$i]['host'] = 'localhost';
and change it to
$cfg['Servers'][$i]['host'] = 'localhost:3307';