step 1 : Add new user in your mysql database privileges options. You will get following window to add new user.
step 2 : Make following changes in mysql config file name my.conf(Ubuntu OS).
From :
bind-address = 127.0.0.1
To:
bind-address = *
NOTE : my.conf file exist in ubuntu at this location : /etc/mysql/my.cnf
step 3 : Finally restart mysql service by following ubuntu command.
/etc/init.d/mysql restart
step 4 : Make following changes in config.php file
'db'=>array(
'connectionString' => 'mysql:host=NETWORK_DESKTOP_IP;dbname=DATABASE_NAME',
'emulatePrepare' => true,
'username' => 'USERNAME',
'password' => 'PASSWORD',
'charset' => 'utf8',
),