How to recover the default php.ini
You can copy from /usr/share/php5/php.ini-production.
sudo cp /usr/share/php5/php.ini-production /etc/php5/apache2/php.ini
You can copy from /usr/share/php5/php.ini-production.
sudo cp /usr/share/php5/php.ini-production /etc/php5/apache2/php.ini