Lamp Delete

dpkg --purge phpmyadmin
dpkg --purge mysql-server
dpkg --purge apache2.2-common

or

sudo apt-get remove apache2*
sudo apt-get remove phpmyadmin 
sudo apt-get remove mysql-server
sudo apt-get remove php5

or
sudo apt-get --purge apache2*
sudo apt-get --purge phpmyadmin 
sudo apt-get --purge mysql-server
sudo apt-get --purge php5

or

#removing Mysql
sudo apt-get remove --purge mysql-server mysql-client mysql-common
sudo apt-get autoremove
sudo apt-get autoclean
 
sudo rm -rf /var/lib/mysql            or backup sudo mv /var/lib/mysql /var/lib/mysql-bak
sudo rm -rf /etc/mysql*
 
#removing phpmyadmin
sudo apt-get autoremove phpmyadmin
 
#installing Mysql
sudo apt-get install mysql-server
 
#Installing phpmyadmin
sudo apt-get install phpmyadmin