set password mysql phpmyadmin config.inc.php

=> browse to phpmyadmin folder and find config.inc.php
edit with any editor you like

change this  :

 /* Authentication type and info */
$cfg['Servers'][$i]['auth_type'] = 'config';
$cfg['Servers'][$i]['user'] = 'root';
$cfg['Servers'][$i]['password'] = '';
$cfg['Servers'][$i]['extension'] = 'mysql';
$cfg['Servers'][$i]['AllowNoPassword'] = true;