New file /etc/apache2/sites-available/phpmyadmin as follow
<VirtualHost *:80>
ServerName localhost
Alias /phpmyadmin /usr/share/phpmyadmin
<Directory /usr/share/phpmyadmin>
Options FollowSymLinks
DirectoryIndex index.php
<IfModule mod_php5.c>
AddType application/x-httpd-php .php
php_flag magic_quotes_gpc Off
php_flag track_vars On
php_flag register_globals Off
php_value include_path .
</ifmodule>
Order deny,allow
Deny from all
Allow from 127.0.0.1
</directory>
# Authorize for setup
<Directory /usr/share/phpmyadmin/setup>
<IfModule mod_authn_file.c>
AuthType Basic
AuthName "phpMyAdmin Setup"
AuthUserFile /etc/phpmyadmin/htpasswd.setup
</ifmodule>
Require valid-user
</directory>
# Disallow web access to directories that don't need it
<Directory /usr/share/phpmyadmin/libraries>
Order Deny,Allow
Deny from All
</directory>
<Directory /usr/share/phpmyadmin/setup/lib>
Order Deny,Allow
Deny from All
</directory>
</virtualhost>