Run Apache with youruser not www-data

edit /etc/apache2/envvars
---
#export APACHE_RUN_USER=www-data
#export APACHE_RUN_GROUP=www-data
export APACHE_RUN_USER=youruser
export APACHE_RUN_GROUP=youruser
---

chown youruser this
/var/lib/phpmyadmin
/etc/phpmyadmin
/usr/share/phpmyadmin
/var/lock/apache2