sudo apt-get install php5-gd
sudo apt-get install php5-imap
sudo apt-get install php-pear
sudo apt-get install php5-dev
sudo apt-get install php5-mcrypt
sudo apt-get install build-essential
sudo pecl install mailparse
sudo vi /etc/php5/apache2/php.ini
extension=mcrypt.so
extension=imap.so
extension=mailparse.so
sudo /etc/init.d/apache2 restart