Forbidden :You don't have permission to access /phpmyadmin on this server

Intall Php

sudo yum install php

then restart httpd :

sudo systemctl restart httpd

Edit config file

gedit /etc/httpd/conf.d/phpMyAdmin.conf

Find line that read follows

Require ip 127.0.0.1
Replace with your workstation IP address:

replace yours with following:

<Directory /usr/share/phpMyAdmin/>
   AddDefaultCharset UTF-8
   <IfModule mod_authz_core.c>
     # Apache 2.4
   </IfModule>
   <IfModule !mod_authz_core.c>
     # Apache 2.2
   </IfModule>
</Directory>

Restart Apache:

service httpd restart

start phpmyadmin service 

service httpd start